Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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071
CDUS41 KLWX 182123
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
523 PM EDT MON AUG 18 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 18 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 76 2:41 AM 98 2009 86 -10 89
MINIMUM 71 3:59 PM 45 1981 65 6 71
AVERAGE 74 76 -2 80
PRECIPITATION (IN)
TODAY 0.00 1.39 2010 0.11 -0.11 0.61
MONTH TO DATE 0.82 2.06 -1.24 3.05
SINCE JUN 1 10.69 10.51 0.18 6.40
SINCE JAN 1 24.61 27.75 -3.14 23.70
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 15 13 2 0
SINCE JUL 1 0 0 0 0
COOLING
TODAY 9 11 -2 15
MONTH TO DATE 177 208 -31 261
SINCE JUN 1 975 824 151 1114
SINCE JAN 1 1093 930 163 1297
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 10.7
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 1:00 AM
LOWEST 76 11:00 AM
AVERAGE 83
..........................................................
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 2025........SUNRISE 6:26 AM EDT SUNSET 8:00 PM EDT
AUGUST 19 2025........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.
$$