504
CDUS41 KLWX 150633
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
233 AM EDT FRI MAY 15 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 14 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 63 2:35 PM 89 2010 75 -12 73
MINIMUM 51 11:47 PM 32 1996 52 -1 62
2013
AVERAGE 57 64 -7 68
PRECIPITATION (IN)
YESTERDAY 0.04 1.87 2018 0.16 -0.12 0.10
MONTH TO DATE 0.86 2.06 -1.20 3.25
SINCE MAR 1 5.38 9.03 -3.65 6.68
SINCE JAN 1 11.18 14.58 -3.40 11.10
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 8 4 4 0
MONTH TO DATE 90 69 21 20
SINCE MAR 1 740 1036 -296 711
SINCE JUL 1 4369 4546 -177 4033
COOLING
YESTERDAY 0 2 -2 3
MONTH TO DATE 8 24 -16 32
SINCE MAR 1 94 46 48 79
SINCE JAN 1 94 46 48 79
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WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 11.9
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 2:00 AM
LOWEST 44 2:00 PM
AVERAGE 71
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 90 1962
MINIMUM TEMPERATURE (F) 53 37 1984
2016
SUNRISE AND SUNSET
MAY 15 2026...........SUNRISE 5:57 AM EDT SUNSET 8:16 PM EDT
MAY 16 2026...........SUNRISE 5:56 AM EDT SUNSET 8:17 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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