National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2017-12-13 05:21 UTC
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574
CDUS41 KLWX 130521
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1221 AM EST WED DEC 13 2017
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 12 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 46 147 PM 72 1979 47 -1 53
MINIMUM 22 1159 PM 9 1988 28 -6 40
AVERAGE 34 37 -3 47
PRECIPITATION (IN)
YESTERDAY T 0.95 1964 0.11 -0.11 0.12
MONTH TO DATE 0.34 1.30 -0.96 1.48
SINCE DEC 1 0.34 1.30 -0.96 1.48
SINCE JAN 1 40.23 39.88 0.35 34.45
SNOWFALL (IN)
YESTERDAY T 10.6 1982 0.1 -0.1
MONTH TO DATE 4.0 1.1 2.9
SINCE JUL 1 4.0 1.6 2.4
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 31 28 3 18
MONTH TO DATE 307 312 -5 297
SINCE DEC 1 307 312 -5 297
SINCE JUL 1 1101 1228 -127 1024
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1281 1178 103 1559
..................................................................
WIND (MPH)
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 43 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 14.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT SNOW
RELATIVE HUMIDITY (PERCENT)
HIGHEST 82 900 AM
LOWEST 36 1000 PM
AVERAGE 59
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 73 2015
MINIMUM TEMPERATURE (F) 28 7 1988
SUNRISE AND SUNSET
DECEMBER 13 2017......SUNRISE 720 AM EST SUNSET 448 PM EST
DECEMBER 14 2017......SUNRISE 721 AM EST SUNSET 448 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$