268
CDUS41 KLWX 182129
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
529 PM EDT TUE AUG 18 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 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 87 3:58 PM 98 2009 86 1 76
MINIMUM 71 4:39 AM 45 1981 65 6 68
AVERAGE 79 76 3 72
PRECIPITATION (IN)
TODAY 0.00 1.39 2010 0.11 -0.11 0.00
MONTH TO DATE 3.53 2.06 1.47 0.82
SINCE JUN 1 13.16 10.51 2.65 10.69
SINCE JAN 1 28.08 27.75 0.33 24.61
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 JUN 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 1 13 -12 15
SINCE JUL 1 0 0 0 0
COOLING
TODAY 14 11 3 7
MONTH TO DATE 259 208 51 175
SINCE JUN 1 972 824 148 973
SINCE JAN 1 1145 930 215 1091
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 1:00 AM
LOWEST 48 4:00 PM
AVERAGE 73
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 95 2002
2019
MINIMUM TEMPERATURE (F) 65 51 1998
SUNRISE AND SUNSET
AUGUST 18 2026........SUNRISE 6:26 AM EDT SUNSET 8:00 PM EDT
AUGUST 19 2026........SUNRISE 6:27 AM EDT SUNSET 7:59 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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