National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-12-18 05:29 UTC
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092
CDUS41 KLWX 180529
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1229 AM EST FRI DEC 18 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 17 2020...
CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1960 TO 2020
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 36 3:47 PM 70 1984 45 -9 40
MINIMUM 28 7:29 AM 3 1989 27 1 34
AVERAGE 32 36 -4 37
PRECIPITATION (IN)
YESTERDAY 0.01 0.75 2000 0.09 -0.08 0.07
MONTH TO DATE 3.54 1.77 1.77 2.34
SINCE DEC 1 3.54 1.77 1.77 2.34
SINCE JAN 1 47.19 40.35 6.84 40.18
SNOWFALL (IN)
YESTERDAY T 4.3 1973 0.1 -0.1 0.0
MONTH TO DATE 2.3 1.7 0.6 0.6
SINCE DEC 1 2.3 1.7 0.6 0.6
SINCE JUL 1 2.3 2.2 0.1 0.6
SNOW DEPTH 1
DEGREE DAYS
HEATING
YESTERDAY 33 29 4 28
MONTH TO DATE 420 455 -35 443
SINCE DEC 1 420 455 -35 443
SINCE JUL 1 1087 1371 -284 1306
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1406 1178 228 1524
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 6.5
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT SNOW
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 12:00 AM
LOWEST 72 1:00 PM
AVERAGE 82
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 45 76 2006
MINIMUM TEMPERATURE (F) 26 3 1989
SUNRISE AND SUNSET
DECEMBER 18 2020......SUNRISE 7:24 AM EST SUNSET 4:50 PM EST
DECEMBER 19 2020......SUNRISE 7:24 AM EST SUNSET 4:50 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$