288
CDUS41 KLWX 200630
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
230 AM EDT WED MAY 20 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 19 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 96R 2:47 PM 92 1996 76 20 75
1997
MINIMUM 67 11:59 PM 36 2002 54 13 55
AVERAGE 82 65 17 65
PRECIPITATION (IN)
YESTERDAY T 1.18 1988 0.15 -0.15 0.00
MONTH TO DATE 0.87 2.83 -1.96 3.34
SINCE MAR 1 5.39 9.80 -4.41 6.77
SINCE JAN 1 11.19 15.35 -4.16 11.19
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 3 -3 0
MONTH TO DATE 93 87 6 20
SINCE MAR 1 743 1054 -311 711
SINCE JUL 1 4372 4564 -192 4033
COOLING
YESTERDAY 17 3 14 0
MONTH TO DATE 47 38 9 68
SINCE MAR 1 133 60 73 115
SINCE JAN 1 133 60 73 115
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WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 11:00 PM
LOWEST 32 4:00 PM
AVERAGE 61
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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 2026...........SUNRISE 5:53 AM EDT SUNSET 8:20 PM EDT
MAY 21 2026...........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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