570
CDUS41 KLWX 190624
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
224 AM EDT TUE AUG 19 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 18 2025
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)
YESTERDAY
MAXIMUM 76 2:41 AM 98 2009 86 -10 89
MINIMUM 68 11:59 PM 45 1981 65 3 71
AVERAGE 72 76 -4 80
PRECIPITATION (IN)
YESTERDAY 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)
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 15 13 2 0
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 7 11 -4 15
MONTH TO DATE 175 208 -33 261
SINCE JUN 1 973 824 149 1114
SINCE JAN 1 1091 930 161 1297
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WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (360)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 9.9
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 1:00 AM
LOWEST 76 11:00 AM
AVERAGE 83
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 95 2002
2019
MINIMUM TEMPERATURE (F) 65 51 1998
SUNRISE AND SUNSET
AUGUST 19 2025........SUNRISE 6:27 AM EDT SUNSET 7:59 PM EDT
AUGUST 20 2025........SUNRISE 6:28 AM EDT SUNSET 7:57 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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