031
CDUS41 KLWX 180636
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
236 AM EDT TUE AUG 18 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 17 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 91 2:49 PM 101 1988 87 4 95
MINIMUM 72 11:59 PM 44 1979 65 7 72
AVERAGE 82 76 6 84
PRECIPITATION (IN)
YESTERDAY 0.01 3.32 1997 0.11 -0.10 0.15
MONTH TO DATE 3.53 1.95 1.58 0.82
SINCE JUN 1 13.16 10.40 2.76 10.69
SINCE JAN 1 28.08 27.64 0.44 24.61
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 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
YESTERDAY 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
YESTERDAY 17 11 6 19
MONTH TO DATE 245 197 48 168
SINCE JUN 1 958 813 145 966
SINCE JAN 1 1131 919 212 1084
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WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 12:00 AM
LOWEST 55 5:00 PM
AVERAGE 76
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 98 2009
MINIMUM TEMPERATURE (F) 65 45 1981
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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