373
CDUS41 KLWX 100629
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
229 AM EDT SUN MAY 10 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 9 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 76 3:48 PM 91 1963 74 2 63
MINIMUM 52 11:57 PM 30 1976 51 1 52
AVERAGE 64 62 2 58
PRECIPITATION (IN)
YESTERDAY 0.00 0.93 1974 0.15 -0.15 0.55
MONTH TO DATE 0.29 1.29 -1.00 1.43
SINCE MAR 1 4.81 8.26 -3.45 4.86
SINCE JAN 1 10.61 13.81 -3.20 9.28
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 1 5 -4 7
MONTH TO DATE 63 49 14 9
SINCE MAR 1 713 1016 -303 700
SINCE JUL 1 4342 4526 -184 4022
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 7 14 -7 29
SINCE MAR 1 93 36 57 76
SINCE JAN 1 93 36 57 76
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WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 5.5
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 11:00 PM
LOWEST 40 4:00 PM
AVERAGE 64
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 90 1963
MINIMUM TEMPERATURE (F) 51 31 1966
1983
SUNRISE AND SUNSET
MAY 10 2026...........SUNRISE 6:02 AM EDT SUNSET 8:11 PM EDT
MAY 11 2026...........SUNRISE 6:01 AM EDT SUNSET 8:12 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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