National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-12-20 05:23 UTC
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333
CDUS41 KLWX 200523
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1223 AM EST SUN DEC 20 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 19 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 4:38 PM 63 1967 45 -9 34
MINIMUM 23 7:44 AM -2 1989 26 -3 19
AVERAGE 30 35 -5 27
PRECIPITATION (IN)
YESTERDAY 0.00 1.34 2009 0.09 -0.09 0.00
MONTH TO DATE 3.54 1.95 1.59 2.34
SINCE DEC 1 3.54 1.95 1.59 2.34
SINCE JAN 1 47.19 40.53 6.66 40.18
SNOWFALL (IN)
YESTERDAY 0.0 16.0 2009 0.1 -0.1 0.0
MONTH TO DATE 2.4 1.9 0.5 0.6
SINCE DEC 1 2.4 1.9 0.5 0.6
SINCE JUL 1 2.4 2.4 -0.0 0.6
SNOW DEPTH 1
DEGREE DAYS
HEATING
YESTERDAY 35 30 5 38
MONTH TO DATE 488 514 -26 513
SINCE DEC 1 488 514 -26 513
SINCE JUL 1 1155 1430 -275 1376
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 8 HIGHEST WIND DIRECTION SE (150)
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 2.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 9:00 AM
LOWEST 69 3:00 PM
AVERAGE 81
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 45 64 1988
MINIMUM TEMPERATURE (F) 26 8 1991
SUNRISE AND SUNSET
DECEMBER 20 2020......SUNRISE 7:25 AM EST SUNSET 4:51 PM EST
DECEMBER 21 2020......SUNRISE 7:25 AM EST SUNSET 4:51 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$