931
CDUS41 KLWX 170624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT SUN MAY 17 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 16 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 85 3:49 PM 90 1998 75 10 89
MINIMUM 45 5:04 AM 35 2000 53 -8 65
AVERAGE 65 64 1 77
PRECIPITATION (IN)
YESTERDAY T 1.97 2014 0.15 -0.15 T
MONTH TO DATE 0.86 2.37 -1.51 3.33
SINCE MAR 1 5.38 9.34 -3.96 6.76
SINCE JAN 1 11.18 14.89 -3.71 11.18
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 1.0 4.0 -3.0 0.0
SINCE JUL 1 13.6 21.0 -7.4 15.5
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 4 -4 0
MONTH TO DATE 93 77 16 20
SINCE MAR 1 743 1044 -301 711
SINCE JUL 1 4372 4554 -182 4033
COOLING
YESTERDAY 0 3 -3 12
MONTH TO DATE 8 29 -21 52
SINCE MAR 1 94 51 43 99
SINCE JAN 1 94 51 43 99
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WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 5.0
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 5:00 AM
LOWEST 29 1:00 PM
AVERAGE 63
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 93 1960
MINIMUM TEMPERATURE (F) 53 30 1984
SUNRISE AND SUNSET
MAY 17 2026...........SUNRISE 5:55 AM EDT SUNSET 8:18 PM EDT
MAY 18 2026...........SUNRISE 5:55 AM EDT SUNSET 8:18 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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