243
CDUS41 KLWX 182140
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
540 PM EDT MON MAY 18 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 18 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 95R 2:49 PM 91 1987 75 20 77
MINIMUM 62 5:37 AM 33 1973 54 8 62
AVERAGE 79 64 15 70
PRECIPITATION (IN)
TODAY 0.00 3.13 1988 0.15 -0.15 0.00
MONTH TO DATE 0.87 2.68 -1.81 3.34
SINCE MAR 1 5.39 9.65 -4.26 6.77
SINCE JAN 1 11.19 15.20 -4.01 11.19
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0 MM 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 0 3 -3 0
MONTH TO DATE 93 84 9 20
SINCE MAR 1 743 1051 -308 711
SINCE JUL 1 4372 4561 -189 4033
COOLING
TODAY 14 3 11 5
MONTH TO DATE 30 35 -5 68
SINCE MAR 1 116 57 59 115
SINCE JAN 1 116 57 59 115
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SE (140)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 3.3
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 35 3:00 PM
AVERAGE 64
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 92 1996
1997
MINIMUM TEMPERATURE (F) 54 36 2002
SUNRISE AND SUNSET
MAY 18 2026...........SUNRISE 5:55 AM EDT SUNSET 8:18 PM EDT
MAY 19 2026...........SUNRISE 5:54 AM EDT SUNSET 8:19 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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