National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-12-16 05:20 UTC
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430
CDUS41 KLWX 160520
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1220 AM EST WED DEC 16 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 15 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 41 2:43 PM 71 1971 46 -5 53
MINIMUM 27 11:59 PM 5 1989 27 0 35
AVERAGE 34 36 -2 44
PRECIPITATION (IN)
YESTERDAY 0.00 2.49 2018 0.09 -0.09 T
MONTH TO DATE 2.23 1.58 0.65 1.81
SINCE DEC 1 2.23 1.58 0.65 1.81
SINCE JAN 1 45.88 40.16 5.72 39.65
SNOWFALL (IN)
YESTERDAY 0.0 4.7 1981 0.1 -0.1 T
MONTH TO DATE T 1.5 -1.5 0.2
SINCE DEC 1 T 1.5 -1.5 0.2
SINCE JUL 1 T 2.0 -2.0 0.2
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 31 29 2 21
MONTH TO DATE 353 397 -44 385
SINCE DEC 1 353 397 -44 385
SINCE JUL 1 1020 1313 -293 1248
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 14 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 6.3
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 3:00 AM
LOWEST 44 11:00 AM
AVERAGE 61
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 46 72 1971
MINIMUM TEMPERATURE (F) 27 9 2016
SUNRISE AND SUNSET
DECEMBER 16 2020......SUNRISE 7:22 AM EST SUNSET 4:49 PM EST
DECEMBER 17 2020......SUNRISE 7:23 AM EST SUNSET 4:49 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$