960
CDUS41 KLWX 120629
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
229 AM EDT TUE MAY 12 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 11 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 64 4:48 PM 90 1993 74 -10 80
MINIMUM 47 11:59 PM 29 1966 52 -5 48
AVERAGE 56 63 -7 64
PRECIPITATION (IN)
YESTERDAY 0.03 3.73 2008 0.15 -0.12 0.00
MONTH TO DATE 0.41 1.59 -1.18 1.43
SINCE MAR 1 4.93 8.56 -3.63 4.86
SINCE JAN 1 10.73 14.11 -3.38 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 9 4 5 1
MONTH TO DATE 72 57 15 18
SINCE MAR 1 722 1024 -302 709
SINCE JUL 1 4351 4534 -183 4031
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 7 18 -11 29
SINCE MAR 1 93 40 53 76
SINCE JAN 1 93 40 53 76
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WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 6.0
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 10:00 AM
LOWEST 30 5:00 PM
AVERAGE 54
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 90 2018
MINIMUM TEMPERATURE (F) 52 34 1969
SUNRISE AND SUNSET
MAY 12 2026...........SUNRISE 6:00 AM EDT SUNSET 8:13 PM EDT
MAY 13 2026...........SUNRISE 5:59 AM EDT SUNSET 8:14 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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