820
CDUS41 KLWX 152130
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
530 PM EDT FRI MAY 15 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 15 2026
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 72 4:12 PM 90 1962 75 -3 81
MINIMUM 52 1:25 AM 37 1984 53 -1 64
2016
AVERAGE 62 64 -2 73
PRECIPITATION (IN)
TODAY 0.00 2.40 2003 0.16 -0.16 0.08
MONTH TO DATE 0.86 2.22 -1.36 3.33
SINCE MAR 1 5.38 9.19 -3.81 6.76
SINCE JAN 1 11.18 14.74 -3.56 11.18
SNOWFALL (IN)
TODAY 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
TODAY 3 4 -1 0
MONTH TO DATE 93 73 20 20
SINCE MAR 1 743 1040 -297 711
SINCE JUL 1 4372 4550 -178 4033
COOLING
TODAY 0 2 -2 8
MONTH TO DATE 8 26 -18 40
SINCE MAR 1 94 48 46 87
SINCE JAN 1 94 48 46 87
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 9.3
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 69 1:00 AM
LOWEST 36 4:00 PM
AVERAGE 53
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 90 1998
MINIMUM TEMPERATURE (F) 53 35 2000
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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