The following tables present IEM computed monthly data summaries based on
daily data provided by or computed for the IEM. A download interface
exists for the daily summary information. The climatology is provided by the
nearest NCEI climate station (USC00258088) within the current 1991-2020
dataset.
To load shown data into Microsoft Excel,
highlight the table information with your mouse and then copy/paste into Excel.
Precipitation Totals [inch]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1949
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1950
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1951
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1952
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1953
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1954
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1955
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1956
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1957
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1958
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1959
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1960
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1961
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1962
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1963
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1964
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1965
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1966
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1967
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1968
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1969
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1970
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1971
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1972
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1973
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1974
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1975
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1976
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1977
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1978
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1979
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1980
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1981
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1982
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1983
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
M
0.00
0.00
0.00
1984
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1985
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1986
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1987
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1988
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1989
0.00
0.00
M
M
M
M
M
M
M
M
M
0.00
1990
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1991
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1992
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1993
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1994
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1995
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1996
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1997
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1998
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1999
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2000
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2001
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2002
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2003
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2004
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2005
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
2006
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.37
0.00
0.17
0.00
0.37
2007
0.12
0.00
0.09
4.05
7.87
0.21
1.09
8.00
3.25
5.68
0.02
1.41
2008
0.02
0.46
1.62
4.66
8.50
9.22
4.85
1.30
2.35
5.36
1.31
0.62
2009
0.18
0.77
1.24
2.52
1.67
6.53
2.96
4.29
1.37
2.27
0.72
0.90
2010
0.66
0.46
1.92
2.98
2.97
8.72
4.98
4.71
2.95
0.44
1.02
0.46
2011
0.25
0.18
0.72
4.15
4.38
4.99
0.34
84.87
122.00
0.00
1.51
1.09
2012
0.00
1.56
1.74
5.36
2.32
3.91
0.16
2.28
1.67
2.84
0.30
0.92
2013
0.29
0.34
0.83
3.56
4.71
5.74
0.17
1.61
3.76
4.13
1.39
0.03
2014
0.02
0.45
0.16
2.22
4.73
7.46
0.97
11.64
4.78
3.44
0.16
1.76
2015
0.53
0.50
0.66
3.28
4.78
3.66
3.75
5.77
6.84
0.85
2.53
4.63
2016
0.55
0.26
1.02
6.92
5.28
1.94
4.61
4.54
3.98
1.05
0.87
1.24
2017
0.80
0.66
2.39
2.55
5.72
3.33
1.89
3.11
2.83
6.34
0.14
0.22
2018
0.53
0.62
1.99
0.04
1.40
8.03
2.64
6.27
3.40
2.33
0.71
2.15
2019
0.36
0.79
1.03
0.57
6.13
1.23
0.99
0.94
0.63
1.41
0.39
0.98
2020
0.28
0.01
1.89
1.09
4.18
2.35
2.36
1.81
2.65
0.73
1.14
0.79
2021
0.54
0.11
6.66
1.22
0.96
1.34
2.40
2.03
0.13
1.40
0.21
0.00
2022
0.10
0.30
1.79
1.48
3.57
1.51
0.92
4.65
1.36
0.78
1.36
1.03
2023
1.06
2.15
0.80
4.32
0.60
3.50
6.12
2.58
0.60
1.70
0.39
1.59
2024
1.41
2.61
1.27
3.02
6.92
4.72
7.08
4.57
0.27
1.27
3.61
0.57
2025
0.01
0.08
1.59
0.76
1.32
4.17
2.36
M
M
M
M
M
NCEI Climatology
0.92
1.19
1.82
3.45
4.82
4.97
3.69
3.95
3.13
2.47
1.35
1.34
Average Wind Speed [MPH]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
13.2
15.6
15.7
19.1
13.1
9.7
9.5
9.7
8.7
10.2
11.0
10.9
1949
13.2
11.0
12.3
12.1
10.4
9.7
9.7
8.0
9.9
10.5
11.1
11.9
1950
10.1
7.8
11.7
10.5
8.0
8.6
5.8
5.2
4.8
9.4
11.7
12.1
1951
11.7
12.2
16.1
15.8
12.3
9.1
9.6
9.6
9.4
11.3
11.0
12.4
1952
8.8
8.7
11.3
9.6
10.9
12.8
10.4
10.3
9.4
9.4
10.9
9.5
1953
10.4
11.8
13.5
13.8
13.3
13.5
7.9
7.7
7.5
7.6
8.3
11.1
1954
11.5
12.1
13.6
12.1
9.1
11.4
9.4
9.6
9.1
8.8
9.5
9.0
1955
8.4
9.0
11.3
12.8
10.5
9.5
10.9
8.5
10.4
10.6
11.7
10.6
1956
10.3
7.8
12.9
13.8
13.4
10.7
9.0
8.2
8.6
9.6
10.6
8.6
1957
8.1
7.8
9.4
9.5
8.0
6.4
6.9
6.6
5.8
7.4
7.4
6.5
1958
6.0
7.7
7.8
8.3
6.4
8.6
6.8
5.3
7.1
6.4
7.7
6.6
1959
8.8
9.1
10.0
8.9
9.5
8.0
6.8
7.7
6.7
6.9
7.3
6.2
1960
6.1
7.9
7.5
11.3
9.4
7.3
4.8
8.2
5.3
5.9
6.7
7.7
1961
5.9
6.5
8.7
9.1
8.4
7.0
5.7
4.6
7.5
5.9
6.7
6.0
1962
7.9
7.5
8.5
8.9
10.9
7.9
6.5
7.2
6.3
7.1
7.0
8.8
1963
8.8
9.0
10.6
10.5
9.2
8.7
7.8
6.6
7.1
6.3
8.0
7.6
1964
7.2
8.7
10.3
12.3
9.6
7.5
8.0
7.2
6.8
6.7
7.6
7.8
1965
7.7
7.3
10.6
9.8
9.8
6.9
5.5
5.9
7.9
7.4
7.0
6.8
1966
7.8
6.8
10.7
9.3
9.4
8.8
6.0
5.4
5.5
7.9
6.1
6.0
1967
7.8
10.0
8.8
10.9
9.0
6.1
4.8
5.8
5.5
8.7
6.7
8.0
1968
8.4
8.4
11.9
11.0
10.4
9.3
7.4
6.8
6.5
9.1
6.9
10.5
1969
9.9
6.7
8.7
10.2
7.8
8.3
6.5
5.3
6.0
7.9
6.1
6.0
1970
7.5
8.1
8.4
10.3
6.9
7.1
5.3
5.2
6.4
7.3
9.9
7.5
1971
8.0
8.6
9.5
10.0
8.3
6.2
5.6
4.6
7.2
7.5
7.2
6.2
1972
7.1
7.7
10.9
8.1
7.9
6.0
6.7
6.4
7.7
7.3
7.6
8.6
1973
7.7
8.5
10.1
11.5
9.2
7.7
6.5
6.9
6.4
6.7
6.5
8.3
1974
5.6
8.3
9.0
10.4
8.7
7.8
7.7
6.7
6.7
6.6
8.1
6.6
1975
8.7
9.0
9.5
10.8
7.4
7.4
6.5
8.7
6.4
7.6
8.7
7.3
1976
9.9
8.4
10.7
10.0
7.7
9.2
7.0
7.7
7.4
7.1
8.3
8.4
1977
9.6
8.9
10.8
9.3
8.1
6.9
8.5
6.4
6.6
8.5
9.6
10.0
1978
8.5
8.4
8.7
11.7
8.1
8.2
7.2
7.5
7.5
7.1
7.5
9.0
1979
9.2
8.3
12.2
9.5
8.1
7.2
5.8
6.7
6.3
7.7
7.0
7.2
1980
8.6
8.5
10.3
9.4
8.0
8.8
6.7
7.8
6.6
7.4
7.0
7.6
1981
6.5
10.3
8.2
9.7
8.1
7.5
5.9
5.5
7.2
8.1
6.9
5.6
1982
9.0
5.8
9.1
9.2
6.1
5.4
5.9
5.1
6.0
6.7
7.7
7.1
1983
7.8
7.4
9.7
9.2
8.1
6.8
7.2
5.7
M
2.6
8.3
8.6
1984
5.6
7.5
8.0
10.1
7.5
7.2
6.4
5.2
6.6
6.4
7.8
7.5
1985
9.0
6.7
8.1
7.5
5.5
6.1
3.9
5.2
7.6
5.6
7.0
8.7
1986
7.5
7.1
8.6
8.0
5.0
4.7
4.9
4.6
6.1
5.8
8.2
6.6
1987
7.4
6.8
9.2
7.6
7.7
5.7
7.6
6.3
6.2
7.0
8.2
9.2
1988
8.7
8.6
11.2
8.5
9.3
6.6
4.2
5.5
6.4
5.7
8.9
7.3
1989
6.8
7.1
M
M
M
M
M
M
M
M
M
11.0
1990
6.5
5.6
5.7
8.1
5.7
6.0
6.2
6.2
5.8
7.6
6.7
7.3
1991
5.3
6.5
8.8
8.9
8.2
7.2
5.9
3.9
6.4
6.9
8.9
6.5
1992
7.9
6.9
7.0
7.3
5.7
5.4
5.8
6.4
8.1
6.3
8.0
8.2
1993
6.2
6.0
7.7
7.7
7.2
7.0
6.8
5.5
6.5
6.6
7.8
8.4
1994
8.2
8.2
6.2
9.9
6.6
6.7
6.0
5.0
5.6
6.0
7.2
4.7
1995
7.6
7.7
8.2
9.1
8.4
8.4
7.4
7.8
7.9
9.6
9.9
9.1
1996
11.4
10.8
12.4
11.9
8.9
7.6
6.3
6.6
7.8
11.1
10.5
10.6
1997
12.0
9.7
11.8
9.7
9.9
7.3
8.1
6.5
7.7
9.3
9.5
9.1
1998
8.2
9.3
11.4
11.0
8.3
9.3
6.6
6.7
7.1
8.2
9.2
8.5
1999
10.2
10.9
10.5
11.8
10.2
8.5
7.7
7.2
7.4
8.4
8.5
9.1
2000
9.5
10.0
9.3
10.8
9.4
9.0
7.1
7.0
8.2
7.7
10.7
12.0
2001
9.4
10.4
14.6
10.9
10.1
8.3
7.6
7.3
7.1
8.8
8.5
9.7
2002
9.4
11.1
11.6
11.4
9.5
9.3
7.6
7.8
7.6
7.6
7.6
7.2
2003
9.4
8.8
10.1
10.0
8.2
7.1
7.7
6.4
8.2
7.9
9.2
9.9
2004
9.2
9.6
10.8
9.5
9.9
7.3
6.3
7.3
9.0
8.5
7.9
8.2
2005
7.3
6.7
8.7
9.9
8.8
8.2
7.0
5.6
7.6
7.4
9.0
7.7
2006
8.6
8.0
10.5
9.1
9.6
6.8
6.3
6.2
7.6
8.3
7.7
7.6
2007
8.9
9.5
10.2
10.7
9.7
8.6
7.1
7.5
8.9
8.5
7.9
6.4
2008
8.2
8.7
9.0
11.2
9.5
7.6
7.6
6.6
7.5
9.0
9.9
9.7
2009
8.2
9.1
10.6
10.0
8.3
6.9
6.3
7.2
5.8
8.7
7.6
9.4
2010
7.9
7.6
9.0
9.8
8.8
8.1
7.1
7.5
7.9
7.2
9.9
9.2
2011
8.5
9.2
9.4
11.6
10.7
10.0
7.4
6.5
5.8
8.2
8.5
6.7
2012
8.2
8.3
8.9
9.4
10.0
9.2
7.0
6.4
5.4
8.6
7.9
7.3
2013
7.4
9.9
9.8
10.0
9.6
8.5
6.8
6.8
8.2
8.5
8.8
7.8
2014
10.3
8.6
10.4
10.8
8.4
8.6
7.3
6.3
7.1
7.7
10.4
8.1
2015
8.1
8.4
7.9
9.1
8.9
6.6
6.4
6.8
8.4
7.3
8.8
8.6
2016
7.7
9.6
9.7
11.4
7.8
7.8
7.5
7.2
8.0
7.8
7.7
8.7
2017
8.1
7.7
10.4
9.0
8.4
8.3
6.0
6.2
7.7
9.5
7.7
8.5
2018
7.8
8.0
10.5
9.9
7.0
8.8
5.7
6.5
7.8
6.8
7.6
7.3
2019
8.9
9.0
9.0
9.2
7.8
6.9
6.5
6.4
8.8
9.0
8.2
7.5
2020
8.3
8.0
9.3
9.4
8.2
9.9
6.9
6.7
6.7
7.9
7.8
6.8
2021
7.7
6.7
9.6
9.0
7.0
6.0
5.1
6.7
6.3
7.1
7.6
7.8
2022
8.1
8.9
10.2
12.2
9.4
7.5
6.6
5.9
7.3
7.3
10.2
10.4
2023
8.3
8.6
10.1
11.7
7.8
6.3
5.6
6.7
7.5
8.7
6.8
7.3
2024
7.6
8.3
9.3
11.4
8.4
8.2
6.2
6.4
6.6
8.1
7.7
7.8
2025
8.6
8.6
10.5
10.4
7.5
7.8
7.0
M
M
M
M
M
NCEI Climatology
M
M
M
M
M
M
M
M
M
M
M
M
Average Daily High Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
25.55
34.79
42.84
69.00
73.90
81.93
87.94
87.26
82.37
67.55
48.37
36.87
1949
25.29
30.21
45.23
64.53
75.71
83.33
87.13
84.58
73.00
68.39
58.67
40.32
1950
30.68
35.96
44.90
57.60
72.23
81.90
79.71
78.84
74.83
71.55
45.67
34.90
1951
31.13
39.18
40.42
54.70
72.97
74.13
83.58
85.26
71.00
62.81
43.57
29.45
1952
32.19
43.34
42.13
60.97
72.77
89.93
88.81
81.55
79.87
64.61
49.73
34.13
1953
33.42
42.07
49.71
56.77
71.90
88.67
88.87
87.10
82.33
72.23
53.37
42.61
1954
32.03
51.64
44.23
67.47
69.16
86.70
93.94
84.26
82.10
62.71
55.90
40.94
1955
33.71
29.86
47.65
72.83
77.58
77.97
93.23
92.65
82.37
68.87
43.67
32.68
1956
29.68
36.00
50.77
61.17
76.87
89.10
87.06
88.00
80.67
73.87
49.53
42.35
1957
26.39
42.75
47.81
61.87
71.77
82.20
92.06
87.00
75.27
60.81
44.67
45.16
1958
34.35
30.36
42.68
61.83
77.48
81.07
82.06
85.45
78.50
70.97
54.45
37.23
1959
27.71
34.43
48.71
61.97
72.13
84.23
84.74
88.52
74.33
60.58
43.50
43.13
1960
27.55
26.66
31.35
63.53
73.68
79.27
85.42
84.97
78.00
67.26
51.93
38.26
1961
36.39
40.39
47.06
57.87
69.10
80.17
85.32
83.58
72.27
67.16
46.20
27.68
1962
26.06
31.61
40.23
61.97
80.26
79.90
83.68
83.81
72.07
65.52
49.87
36.29
1963
21.23
36.32
53.29
63.90
71.32
84.80
86.10
82.81
75.93
75.90
55.27
28.00
1964
39.87
40.66
44.90
62.80
76.61
79.57
88.00
79.29
73.07
64.29
49.77
32.77
1965
31.94
30.93
32.48
61.70
77.39
78.77
82.13
81.55
67.90
67.71
51.67
44.13
1966
25.39
37.43
53.00
55.77
72.26
80.43
87.26
79.74
71.27
66.03
49.10
35.19
1967
33.19
37.11
54.13
63.13
67.84
77.77
84.16
82.77
74.07
62.26
47.13
36.84
1968
31.35
36.48
58.74
63.53
67.94
85.13
88.55
86.61
74.83
66.00
44.47
31.06
1969
25.13
33.00
39.58
62.30
71.87
76.97
85.03
83.52
76.60
58.48
50.63
30.94
1970
23.65
42.64
43.48
64.43
77.29
82.57
85.42
84.68
74.57
59.97
45.30
37.32
1971
25.03
31.61
44.71
64.30
68.61
86.07
82.81
83.26
78.90
67.42
48.60
35.94
1972
30.26
37.10
51.48
61.47
71.19
83.03
83.42
83.39
76.00
59.84
42.73
28.74
1973
31.61
35.86
50.77
60.73
70.61
84.10
83.77
86.39
71.53
67.61
47.87
29.61
1974
26.39
39.54
53.10
64.00
71.16
81.03
95.71
82.16
73.97
67.68
48.90
36.00
1975
31.13
28.68
39.19
57.13
75.16
79.20
86.84
86.68
70.57
70.16
49.10
36.81
1976
34.48
45.93
48.65
65.10
69.42
81.30
86.16
86.84
78.47
60.48
45.53
37.16
1977
23.68
44.50
54.48
68.87
79.29
85.67
91.03
80.45
75.17
62.29
47.27
34.26
1978
20.52
22.18
42.90
59.67
70.45
83.10
82.94
83.35
79.77
64.90
46.63
31.48
1979
15.94
22.00
44.90
57.00
71.03
80.80
80.90
83.90
78.90
64.19
45.20
41.58
1980
32.10
29.83
42.58
61.67
72.84
81.77
89.45
85.42
77.90
62.39
53.23
36.19
1981
36.13
39.21
52.26
70.70
71.03
85.57
85.03
80.97
77.80
61.68
52.23
34.29
1982
21.03
32.82
45.68
59.30
71.35
75.90
86.13
80.42
74.00
66.00
46.53
39.77
1983
34.45
39.11
45.35
52.13
67.52
80.27
90.65
89.90
M
53.00
46.20
15.71
1984
28.29
42.97
38.52
55.63
68.68
81.70
86.26
88.16
73.73
62.68
50.53
38.10
1985
29.16
32.07
55.81
66.70
75.13
79.80
85.87
79.77
72.77
63.48
38.10
25.74
1986
42.13
31.29
54.58
62.87
70.90
83.10
85.29
77.06
75.63
62.65
44.83
36.32
1987
38.13
45.79
51.68
67.33
77.39
85.17
88.52
80.16
75.20
60.71
51.97
36.94
1988
32.52
35.97
53.68
63.60
78.65
88.70
85.10
88.32
79.40
62.03
51.30
41.16
1989
43.16
27.00
M
M
M
M
M
M
M
M
M
28.00
1990
45.03
42.46
52.32
62.40
67.74
84.90
84.10
84.19
81.03
66.97
55.07
31.16
1991
25.45
45.29
55.16
64.80
75.97
83.73
86.45
85.10
78.73
65.32
38.77
40.48
1992
42.03
46.69
55.29
61.57
74.45
81.63
82.06
80.10
76.77
65.13
40.93
36.26
1993
28.19
28.18
44.13
57.90
71.06
79.60
82.03
83.45
70.70
61.39
45.60
39.32
1994
28.81
33.39
55.84
63.97
76.48
82.36
83.20
82.52
78.48
66.58
51.10
37.10
1995
32.35
43.57
50.23
59.23
67.65
82.00
91.77
91.74
77.23
66.29
45.33
35.26
1996
27.97
41.04
45.81
62.43
67.23
83.73
82.55
81.42
73.47
65.68
40.00
30.94
1997
29.90
37.18
54.97
55.70
69.68
84.97
86.74
83.61
78.10
65.00
44.73
36.23
1998
33.97
43.93
40.68
62.80
77.29
79.60
85.77
85.26
84.43
65.87
54.00
42.77
1999
31.26
46.39
51.77
62.20
74.77
79.33
89.48
83.26
76.93
68.77
62.40
42.58
2000
38.48
48.69
56.90
65.33
79.62
83.33
83.52
87.00
81.33
67.97
40.90
23.00
2001
34.79
29.05
50.00
67.04
73.17
81.45
88.34
87.19
74.58
64.70
60.07
42.80
2002
40.92
41.76
44.19
64.79
70.94
87.35
92.17
84.61
78.63
55.92
47.97
43.30
2003
32.37
34.32
54.20
64.01
70.11
79.66
88.87
89.67
75.71
68.84
47.15
38.06
2004
29.68
33.43
53.14
65.84
74.21
76.44
81.18
79.90
81.28
69.14
54.32
41.23
2005
32.17
45.76
53.31
65.48
75.15
85.64
88.03
83.79
82.40
66.66
53.36
32.12
2006
46.46
41.32
50.35
67.34
75.41
86.57
88.61
83.82
71.52
59.43
52.14
43.90
2007
34.15
30.86
58.12
61.37
77.12
83.86
89.65
87.75
78.90
68.43
51.15
34.51
2008
33.14
34.03
50.57
59.95
73.43
84.14
85.91
85.76
76.09
65.83
48.35
33.56
2009
32.81
42.15
51.39
61.99
75.01
81.48
81.10
81.67
76.10
55.49
57.22
28.75
2010
23.73
30.09
50.38
69.85
72.39
83.98
86.66
88.55
77.40
70.29
50.65
34.20
2011
27.37
36.75
50.44
62.90
72.96
82.16
89.52
84.27
73.53
68.63
52.02
40.99
2012
42.00
40.52
68.66
68.68
80.37
86.35
95.30
87.16
79.35
62.46
54.79
38.98
2013
36.09
38.74
43.83
58.32
72.14
80.73
86.32
86.82
81.99
64.25
48.90
33.74
2014
34.52
34.15
50.10
64.11
76.30
82.65
84.05
83.42
76.23
66.98
43.89
37.82
2015
39.32
31.04
58.36
65.23
70.42
82.69
85.90
81.91
81.10
67.74
55.21
41.69
2016
32.88
43.81
59.32
65.41
73.25
89.74
85.74
84.63
80.28
69.50
58.35
35.77
2017
34.98
57.54
53.60
63.49
74.16
86.95
88.53
82.38
81.99
65.71
52.47
37.59
2018
33.42
34.98
50.17
57.08
81.65
86.71
86.08
84.38
76.80
61.19
42.55
38.31
2019
31.18
25.07
43.78
70.02
70.76
84.26
87.86
83.27
83.42
58.25
47.06
41.58
2020
34.38
42.91
55.17
64.79
69.02
88.58
88.44
86.63
77.01
61.28
57.29
40.85
2021
36.40
23.96
58.21
65.53
72.35
89.62
87.61
88.17
82.63
67.99
55.25
47.59
2022
34.64
42.36
52.90
61.87
74.64
86.49
89.55
88.88
81.86
69.71
50.22
34.98
2023
35.37
43.99
48.63
67.10
79.92
86.81
84.87
86.41
84.34
67.45
56.04
46.00
2024
29.57
54.32
57.97
68.74
76.95
87.36
87.47
86.42
85.23
75.61
53.06
42.82
2025
35.65
35.26
61.24
66.57
75.87
87.65
87.82
M
M
M
M
M
NCEI Climatology
32.31
37.38
50.28
62.61
72.20
80.80
85.51
83.30
76.91
64.71
49.10
37.10
Average Daily Low Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
4.70
16.79
23.13
46.33
51.61
61.57
67.65
67.00
59.80
42.45
32.60
18.90
1949
9.16
11.96
28.94
41.17
57.00
65.30
68.65
64.87
50.27
46.68
34.37
19.87
1950
8.45
17.86
25.13
35.73
52.06
61.33
62.84
60.90
54.83
48.03
25.77
16.00
1951
12.13
19.96
23.06
38.57
53.84
59.07
65.87
65.23
52.57
44.71
25.67
13.55
1952
14.90
27.48
27.32
41.77
53.32
68.13
67.58
64.48
56.80
37.16
29.50
21.19
1953
19.45
25.43
32.58
37.40
52.35
67.00
68.29
65.23
54.73
48.26
33.30
21.45
1954
9.35
29.82
26.06
43.60
48.48
66.40
71.52
67.84
59.57
45.94
35.27
23.61
1955
15.52
12.79
25.81
48.13
55.10
59.97
72.65
68.00
58.27
43.03
21.87
14.87
1956
13.19
16.93
25.87
35.90
54.81
65.57
65.45
65.45
53.73
48.61
29.77
22.55
1957
9.16
23.21
29.13
41.50
52.55
61.60
72.23
68.16
54.37
43.94
29.90
25.65
1958
19.00
12.71
28.94
40.73
54.71
59.47
64.74
66.16
57.63
45.39
32.52
16.26
1959
9.03
15.64
30.55
39.83
54.23
64.27
64.58
70.16
56.03
41.55
23.80
27.42
1960
14.32
12.41
16.13
43.87
51.68
61.77
66.19
65.84
58.37
46.26
30.40
19.74
1961
13.19
22.50
32.48
36.87
50.26
60.40
66.06
65.26
53.20
44.55
29.20
11.00
1962
8.03
17.32
23.48
38.20
58.39
61.47
66.00
62.87
53.10
46.48
32.73
18.65
1963
4.84
16.68
33.39
42.97
51.97
64.87
68.10
65.06
57.20
51.61
32.57
9.00
1964
18.84
19.83
22.71
41.50
56.39
60.67
68.90
60.23
55.20
39.81
31.77
15.03
1965
12.58
10.71
18.74
41.37
55.97
61.40
65.68
61.45
50.90
44.16
30.47
25.84
1966
8.39
15.57
30.06
35.90
47.77
60.80
69.10
60.10
52.30
39.16
27.97
16.74
1967
13.74
13.61
30.68
42.10
48.13
60.53
63.97
61.65
53.07
42.10
28.73
19.94
1968
12.97
18.69
32.55
39.77
47.58
62.50
67.87
67.29
54.00
44.52
28.43
15.61
1969
11.10
20.43
22.13
40.80
52.90
56.40
68.19
64.77
56.73
40.81
28.93
16.58
1970
7.13
19.82
25.00
39.37
55.74
62.53
65.39
65.00
55.13
41.71
27.83
19.71
1971
8.97
15.93
26.71
41.77
49.32
65.47
62.65
62.87
54.97
47.94
31.40
22.81
1972
11.16
14.76
29.23
39.93
52.94
61.27
65.65
64.32
55.90
40.71
31.77
14.58
1973
15.90
22.50
38.42
40.53
49.71
63.07
66.42
66.42
56.80
47.87
33.10
16.94
1974
11.97
22.61
32.23
42.70
54.06
60.13
70.48
62.81
50.57
47.52
32.13
21.81
1975
13.61
15.61
23.84
40.20
55.26
61.67
66.35
66.77
51.10
43.42
31.00
21.19
1976
13.16
25.28
29.32
45.53
48.45
60.23
67.06
65.00
56.53
39.58
23.27
13.87
1977
5.16
21.93
35.94
49.00
61.74
65.90
69.39
63.39
58.63
45.29
31.97
18.94
1978
6.52
9.57
25.16
44.17
53.32
62.90
66.35
64.00
60.63
42.19
30.83
17.45
1979
3.32
6.89
28.32
38.57
49.97
59.80
65.45
65.74
55.87
41.97
28.67
23.03
1980
18.65
17.41
26.48
40.73
52.58
62.50
69.48
66.68
55.63
40.71
32.67
21.29
1981
16.71
20.07
30.68
48.33
52.23
64.67
69.26
64.48
56.93
44.65
35.33
21.74
1982
6.19
18.50
29.61
38.20
55.55
58.90
68.06
65.81
58.07
45.90
30.90
25.03
1983
23.48
27.25
32.65
37.77
49.29
63.07
70.06
70.00
M
52.00
34.13
4.19
1984
15.48
28.14
26.94
41.27
51.77
65.43
66.32
66.74
53.37
45.48
32.60
20.81
1985
12.48
17.18
36.13
46.23
56.32
59.63
66.55
62.29
57.23
46.48
25.13
10.23
1986
21.03
18.71
34.42
42.90
52.90
64.43
67.77
61.13
60.17
45.97
26.83
24.87
1987
21.10
27.14
33.10
44.60
57.71
65.53
68.65
64.48
56.37
40.19
38.03
26.26
1988
14.61
16.41
30.29
40.57
57.13
66.37
66.74
66.81
57.47
40.52
33.60
21.81
1989
24.81
10.82
M
M
M
M
M
M
M
M
M
25.00
1990
24.77
23.00
34.71
41.73
51.26
65.93
66.74
66.23
58.87
42.00
33.57
13.87
1991
8.52
25.29
32.19
45.27
58.97
65.83
67.26
65.03
55.97
41.52
24.33
25.19
1992
24.48
29.17
34.58
40.23
52.65
61.57
65.16
62.23
56.23
44.16
30.87
20.74
1993
13.23
16.54
29.39
39.20
53.23
61.37
68.35
67.35
51.50
43.06
27.33
22.42
1994
10.87
14.43
31.65
41.80
55.96
67.00
65.15
64.70
55.92
47.45
35.13
23.26
1995
17.55
23.64
32.35
40.53
51.19
64.03
69.35
71.94
55.77
45.23
26.27
22.42
1996
9.77
20.29
23.23
39.03
53.19
63.57
65.87
65.74
55.07
43.97
27.07
15.77
1997
10.06
23.54
30.84
37.87
48.65
64.07
68.71
65.61
58.67
45.55
28.70
25.00
1998
20.45
30.96
27.35
43.27
58.42
62.23
69.90
68.48
62.57
48.16
36.50
22.71
1999
16.48
28.39
31.58
45.13
56.90
63.33
71.97
65.77
54.53
43.19
37.30
22.87
2000
19.90
28.31
36.03
42.42
56.41
61.70
68.33
69.77
56.40
47.84
24.50
7.68
2001
18.81
13.42
33.80
44.90
54.47
61.94
69.83
66.75
55.10
43.18
39.09
22.39
2002
19.63
21.69
23.39
41.95
48.94
66.34
69.92
65.17
58.49
38.81
27.95
21.82
2003
14.36
14.79
28.70
42.78
50.55
60.46
67.84
67.19
51.62
44.43
29.53
24.55
2004
13.30
17.48
34.55
44.24
54.24
60.18
65.21
61.32
59.56
46.23
34.76
21.78
2005
14.99
24.86
29.39
45.80
51.86
65.24
68.46
65.56
58.94
44.19
31.70
17.37
2006
27.30
18.24
31.13
46.34
54.36
64.40
67.82
65.71
51.11
39.56
28.26
22.91
2007
11.62
13.18
35.27
37.30
55.87
60.48
65.82
68.16
53.40
45.03
25.36
12.09
2008
8.98
13.15
24.14
36.32
47.83
61.82
58.14
61.71
52.89
42.24
29.22
11.02
2009
9.71
18.43
27.37
37.91
50.53
61.79
60.40
60.52
51.76
36.74
32.57
11.65
2010
9.79
12.97
30.68
43.58
49.43
64.04
68.87
67.14
54.09
40.38
27.55
15.64
2011
8.61
14.90
28.56
39.86
51.37
63.92
73.45
66.97
52.39
41.69
28.35
19.82
2012
17.79
21.04
42.27
43.57
55.08
62.78
68.95
59.26
47.78
38.48
29.97
19.28
2013
14.72
19.12
25.10
34.64
49.37
61.05
62.65
63.74
56.65
38.43
23.59
10.09
2014
7.16
10.10
21.60
37.59
49.78
61.64
60.29
65.15
53.65
42.35
22.30
24.28
2015
14.46
8.75
25.97
40.81
50.13
61.19
64.37
60.79
59.61
42.99
30.94
24.99
2016
15.88
23.53
32.85
41.89
50.34
63.96
66.78
64.22
58.36
45.79
33.21
15.95
2017
19.34
24.25
31.91
42.42
49.08
60.79
66.80
59.24
57.13
43.04
27.32
15.65
2018
11.84
13.06
29.66
31.36
56.67
65.24
64.73
63.53
58.51
41.11
23.10
20.35
2019
18.49
16.10
27.85
42.47
52.09
65.66
71.31
68.12
65.36
40.77
29.24
24.97
2020
20.33
19.13
34.05
36.60
50.70
66.08
67.34
62.25
51.21
36.71
28.59
17.86
2021
19.56
5.04
35.07
42.12
53.32
66.07
67.50
67.66
59.46
48.01
33.93
25.65
2022
11.88
14.96
29.25
39.07
55.47
64.94
68.73
66.56
57.80
41.99
27.93
16.78
2023
21.55
19.67
28.21
40.86
55.25
64.03
66.20
66.81
58.99
45.11
28.98
26.95
2024
14.09
25.88
32.16
42.16
52.67
64.79
66.15
64.95
56.16
44.81
34.64
23.23
2025
12.31
12.40
32.01
42.66
50.24
64.15
66.63
M
M
M
M
M
NCEI Climatology
12.70
16.86
27.79
39.00
51.19
62.01
66.71
63.41
54.29
41.21
28.70
18.20
Average Daily Temperature (high+low)/2 [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
15.12
25.79
32.98
57.67
62.76
71.75
77.79
77.13
71.08
55.00
40.48
27.89
1949
17.23
21.09
37.08
52.85
66.35
74.32
77.89
74.73
61.63
57.53
46.52
30.10
1950
19.56
26.91
35.02
46.67
62.15
71.62
71.27
69.87
64.83
59.79
35.72
25.45
1951
21.63
29.57
31.74
46.63
63.40
66.60
74.73
75.24
61.78
53.76
34.62
21.50
1952
23.55
35.41
34.73
51.37
63.05
79.03
78.19
73.02
68.33
50.89
39.62
27.66
1953
26.44
33.75
41.15
47.08
62.13
77.83
78.58
76.16
68.53
60.24
43.33
32.03
1954
20.69
40.73
35.15
55.53
58.82
76.55
82.73
76.05
70.83
54.32
45.58
32.27
1955
24.61
21.32
36.73
60.48
66.34
68.97
82.94
80.32
70.32
55.95
32.77
23.77
1956
21.44
26.47
38.32
48.53
65.84
77.33
76.26
76.73
67.20
61.24
39.65
32.45
1957
17.77
32.98
38.47
51.68
62.16
71.90
82.15
77.58
64.82
52.37
37.28
35.40
1958
26.68
21.54
35.81
51.28
66.10
70.27
73.40
75.81
68.07
58.18
43.48
26.74
1959
18.37
25.04
39.63
50.90
63.18
74.25
74.66
79.34
65.18
51.06
33.65
35.27
1960
20.94
19.53
23.74
53.70
62.68
70.52
75.81
75.40
68.18
56.76
41.17
29.00
1961
24.79
31.45
39.77
47.37
59.68
70.28
75.69
74.42
62.73
55.85
37.70
19.34
1962
17.05
24.46
31.85
50.08
69.32
70.68
74.84
73.34
62.58
56.00
41.30
27.47
1963
13.03
26.50
43.34
53.43
61.65
74.83
77.10
73.94
66.57
63.76
43.92
18.50
1964
29.35
30.24
33.81
52.15
66.50
70.12
78.45
69.76
64.13
52.05
40.77
23.90
1965
22.26
20.82
25.61
51.53
66.68
70.08
73.90
71.50
59.40
55.94
41.07
34.98
1966
16.89
26.50
41.53
45.83
60.02
70.62
78.18
69.92
61.78
52.60
38.53
25.97
1967
23.47
25.36
42.40
52.62
57.98
69.15
74.06
72.21
63.57
52.18
37.93
28.39
1968
22.16
27.59
45.65
51.65
57.76
73.82
78.21
76.95
64.42
55.26
36.45
23.34
1969
18.11
26.71
30.85
51.55
62.39
66.68
76.61
74.15
66.67
49.65
39.78
23.76
1970
15.39
31.23
34.24
51.90
66.52
72.55
75.40
74.84
64.85
50.84
36.57
28.52
1971
17.00
23.77
35.71
53.03
58.97
75.77
72.73
73.06
66.93
57.68
40.00
29.37
1972
20.71
25.93
40.35
50.70
62.06
72.15
74.53
73.85
65.95
50.27
37.25
21.66
1973
23.76
29.18
44.60
50.63
60.16
73.58
75.10
76.40
64.17
57.74
40.48
23.27
1974
19.18
31.07
42.66
53.35
62.61
70.58
83.10
72.48
62.27
57.60
40.52
28.90
1975
22.37
22.14
31.52
48.67
65.21
70.43
76.60
76.73
60.83
56.79
40.05
29.00
1976
23.82
35.60
38.98
55.32
58.94
70.77
76.61
75.92
67.50
50.03
34.40
25.52
1977
14.42
33.21
45.21
58.93
70.52
75.78
80.21
71.92
66.90
53.79
39.62
26.60
1978
13.52
15.88
34.03
51.92
61.89
73.00
74.65
73.68
70.20
53.55
38.73
24.47
1979
9.63
14.45
36.61
47.78
60.50
70.30
73.18
74.82
67.38
53.08
36.93
32.31
1980
25.37
23.62
34.53
51.20
62.71
72.13
79.47
76.05
66.77
51.55
42.95
28.74
1981
26.42
29.64
41.47
59.52
61.63
75.12
77.15
72.73
67.37
53.16
43.78
28.02
1982
13.61
25.66
37.65
48.75
63.45
67.40
77.10
73.11
66.03
55.95
38.72
32.40
1983
28.97
33.18
39.00
44.95
58.40
71.67
80.35
79.95
M
52.50
40.17
9.95
1984
21.89
35.55
32.73
48.45
60.23
73.57
76.29
77.45
63.55
54.08
41.57
29.45
1985
20.82
24.62
45.97
56.47
65.73
69.72
76.21
71.03
65.00
54.98
31.62
17.98
1986
31.58
25.00
44.50
52.88
61.90
73.77
76.53
69.10
67.90
54.31
35.83
30.60
1987
29.61
36.46
42.39
55.97
67.55
75.35
78.58
72.32
65.78
50.45
45.00
31.60
1988
23.56
26.19
41.98
52.08
67.89
77.53
75.92
77.56
68.43
51.27
42.45
31.48
1989
33.98
18.91
M
M
M
M
M
M
M
M
M
26.50
1990
34.90
32.73
43.52
52.07
59.50
75.42
75.42
75.21
69.95
54.48
44.32
22.52
1991
16.98
35.29
43.68
55.03
67.47
74.78
76.85
75.06
67.35
53.42
31.55
32.84
1992
33.26
37.93
44.94
50.90
63.55
71.60
73.61
71.16
66.50
54.65
35.90
28.50
1993
20.71
22.36
36.76
48.55
62.15
70.48
75.19
75.40
61.10
52.23
36.47
30.87
1994
19.84
23.91
43.74
52.88
66.22
74.68
74.17
73.61
67.20
57.02
43.12
30.18
1995
24.95
33.61
41.29
49.88
59.42
73.02
80.56
81.84
66.50
55.76
35.80
28.84
1996
18.87
30.66
34.52
50.73
60.21
73.65
74.21
73.58
64.27
54.82
33.53
23.35
1997
19.98
30.36
42.90
46.78
59.16
74.52
77.73
74.61
68.38
55.27
36.72
30.61
1998
27.21
37.45
34.02
53.03
67.85
70.92
77.84
76.87
73.50
57.02
45.25
32.74
1999
23.87
37.39
41.68
53.67
65.84
71.33
80.73
74.52
65.73
55.98
49.85
32.73
2000
29.19
38.50
46.47
53.88
68.02
72.52
75.93
78.39
68.87
57.90
32.70
15.34
2001
26.80
21.24
41.90
55.97
63.82
71.70
79.08
76.97
64.84
53.94
49.58
32.60
2002
30.27
31.72
33.79
53.37
59.94
76.84
81.04
74.89
68.56
47.36
37.96
32.56
2003
23.37
24.56
41.45
53.39
60.33
70.06
78.35
78.43
63.66
56.63
38.34
31.30
2004
21.49
25.45
43.85
55.04
64.23
68.31
73.20
70.61
70.42
57.74
44.54
31.51
2005
23.58
35.31
41.35
55.64
63.50
75.44
78.25
74.68
70.67
55.43
42.53
24.74
2006
36.88
29.78
40.74
56.84
64.88
75.49
78.21
74.77
61.31
49.50
40.20
33.40
2007
22.89
22.02
46.70
49.33
66.50
72.17
77.73
77.96
66.15
56.73
38.26
23.30
2008
21.06
23.59
37.36
48.14
60.63
72.98
72.18
73.74
64.49
54.03
38.78
22.29
2009
21.26
30.29
39.38
49.95
62.77
71.64
70.75
71.10
63.93
46.11
44.90
20.20
2010
16.76
21.53
40.53
56.71
60.91
74.01
77.76
77.85
65.75
55.33
39.10
24.92
2011
17.99
25.83
39.50
51.38
62.16
73.04
81.48
75.62
62.96
55.16
40.19
30.41
2012
29.90
30.78
55.47
56.12
67.73
74.56
82.12
73.21
63.56
50.47
42.38
29.13
2013
25.41
28.93
34.46
46.48
60.75
70.89
74.49
75.28
69.32
51.34
36.25
21.91
2014
20.84
22.13
35.85
50.85
63.04
72.15
72.17
74.29
64.94
54.66
33.10
31.05
2015
26.89
19.90
42.16
53.02
60.27
71.94
75.14
71.35
70.36
55.37
43.08
33.34
2016
24.38
33.67
46.08
53.65
61.80
76.85
76.26
74.42
69.32
57.64
45.78
25.86
2017
27.16
40.89
42.75
52.96
61.62
73.87
77.67
70.81
69.56
54.37
39.90
26.62
2018
22.63
24.02
39.92
44.22
69.16
75.98
75.41
73.95
67.66
51.15
32.82
29.33
2019
24.84
20.59
35.82
56.25
61.42
74.96
79.58
75.69
74.39
49.51
38.15
33.28
2020
27.35
31.02
44.61
50.69
59.86
77.33
77.89
74.44
64.11
49.00
42.94
29.35
2021
27.98
14.50
46.64
53.83
62.83
77.84
77.56
77.91
71.05
58.00
44.59
36.62
2022
23.26
28.66
41.08
50.47
65.05
75.71
79.14
77.72
69.83
55.85
39.07
25.88
2023
28.46
31.83
38.42
53.98
67.58
75.42
75.54
76.61
71.66
56.28
42.51
36.47
2024
21.83
40.10
45.07
55.45
64.81
76.07
76.81
75.68
70.69
60.21
43.85
33.02
2025
23.98
23.83
46.63
54.62
63.05
75.90
77.23
M
M
M
M
M
NCEI Climatology
22.51
27.12
39.04
50.81
61.70
71.40
76.11
73.35
65.60
52.96
38.90
27.65
Average Relative Humidity [%]
This value is computed via a simple average of available observations weighted
by the duration between observations.
