National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-05-21 06:20 UTC
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015
CDUS41 KLWX 210620
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
220 AM EDT WED MAY 21 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 20 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 70 2:57 PM 93 1996 76 -6 81
MINIMUM 53 4:34 AM 36 2002 54 -1 54
AVERAGE 62 65 -3 68
PRECIPITATION (IN)
YESTERDAY 0.02 1.86 2005 0.16 -0.14 T
MONTH TO DATE 3.36 2.99 0.37 3.16
SINCE MAR 1 6.79 9.96 -3.17 8.79
SINCE JAN 1 11.21 15.51 -4.30 16.24
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE MAR 1 0.0 4.0 -4.0 T
SINCE JUL 1 15.5 21.0 -5.5 11.7
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 3 3 0 0
MONTH TO DATE 23 90 -67 47
SINCE MAR 1 714 1057 -343 726
SINCE JUL 1 4036 4567 -531 3690
COOLING
YESTERDAY 0 3 -3 3
MONTH TO DATE 68 41 27 49
SINCE MAR 1 115 63 52 93
SINCE JAN 1 115 63 52 96
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 66 5:00 AM
LOWEST 35 3:00 PM
AVERAGE 51
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 92 1996
2022
MINIMUM TEMPERATURE (F) 55 33 1992
SUNRISE AND SUNSET
MAY 21 2025...........SUNRISE 5:52 AM EDT SUNSET 8:21 PM EDT
MAY 22 2025...........SUNRISE 5:51 AM EDT SUNSET 8:22 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$