National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2017-09-17 05:40 UTC
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574
CDUS41 KLWX 170540
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
140 AM EDT SUN SEP 17 2017
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 16 2017...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2017
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
..................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 84 1250 PM 97 1991 79 5 77
MINIMUM 59 607 AM 37 1984 56 3 65
AVERAGE 72 68 4 71
PRECIPITATION (IN)
YESTERDAY 0.00 2.05 1999 0.15 -0.15 0.00
MONTH TO DATE 1.75 2.03 -0.28 0.17
SINCE SEP 1 1.75 2.03 -0.28 0.17
SINCE JAN 1 34.75 30.03 4.72 28.17
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0
SINCE JUL 1 T 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 30 10 20 0
SINCE SEP 1 30 10 20 0
SINCE JUL 1 31 12 19 0
COOLING
YESTERDAY 7 4 3 6
MONTH TO DATE 48 101 -53 180
SINCE SEP 1 48 101 -53 180
SINCE JAN 1 1109 1117 -8 1443
..................................................................
WIND (MPH)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 2.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 1200 AM
LOWEST 55 100 PM
AVERAGE 78
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 97 1991
MINIMUM TEMPERATURE (F) 56 35 1986
SUNRISE AND SUNSET
SEPTEMBER 17 2017.....SUNRISE 653 AM EDT SUNSET 714 PM EDT
SEPTEMBER 18 2017.....SUNRISE 654 AM EDT SUNSET 713 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$