108
CDUS41 KLWX 200621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT TUE MAY 20 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 19 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 75 4:05 PM 92 1996 76 -1 76
1997
MINIMUM 55 3:18 AM 36 2002 54 1 58
AVERAGE 65 65 0 67
PRECIPITATION (IN)
YESTERDAY 0.00 1.18 1988 0.15 -0.15 0.00
MONTH TO DATE 3.34 2.83 0.51 3.16
SINCE MAR 1 6.77 9.80 -3.03 8.79
SINCE JAN 1 11.19 15.35 -4.16 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 0
MONTH TO DATE 20 87 -67 47
SINCE MAR 1 711 1054 -343 726
SINCE JUL 1 4033 4564 -531 3690
COOLING
YESTERDAY 0 3 -3 2
MONTH TO DATE 68 38 30 46
SINCE MAR 1 115 60 55 90
SINCE JAN 1 115 60 55 93
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WIND (MPH)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 12.0
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 3:00 AM
LOWEST 34 3:00 PM
AVERAGE 56
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 93 1996
MINIMUM TEMPERATURE (F) 54 36 2002
SUNRISE AND SUNSET
MAY 20 2025...........SUNRISE 5:53 AM EDT SUNSET 8:20 PM EDT
MAY 21 2025...........SUNRISE 5:52 AM EDT SUNSET 8:21 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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