National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2025-05-19 06:38 UTC
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997
CDUS41 KLWX 190638
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
238 AM EDT MON MAY 19 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 18 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 77 4:55 PM 91 1987 75 2 64
MINIMUM 62 11:59 PM 33 1973 54 8 61
AVERAGE 70 64 6 63
PRECIPITATION (IN)
YESTERDAY 0.00 3.13 1988 0.15 -0.15 0.69
MONTH TO DATE 3.34 2.68 0.66 3.16
SINCE MAR 1 6.77 9.65 -2.88 8.79
SINCE JAN 1 11.19 15.20 -4.01 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 0 3 -3 2
MONTH TO DATE 20 84 -64 47
SINCE MAR 1 711 1051 -340 726
SINCE JUL 1 4033 4561 -528 3690
COOLING
YESTERDAY 5 3 2 0
MONTH TO DATE 68 35 33 44
SINCE MAR 1 115 57 58 88
SINCE JAN 1 115 57 58 91
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 10.1
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 59 10:00 PM
LOWEST 40 5:00 PM
AVERAGE 50
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 92 1996
1997
MINIMUM TEMPERATURE (F) 54 36 2002
SUNRISE AND SUNSET
MAY 19 2025...........SUNRISE 5:54 AM EDT SUNSET 8:19 PM EDT
MAY 20 2025...........SUNRISE 5:53 AM EDT SUNSET 8:20 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$