064
CDUS41 KLWX 040627
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 AM EDT MON AUG 04 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 3 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 82 3:43 PM 99 1991 87 -5 97
2006
MINIMUM 57 3:24 AM 50 1976 67 -10 70
1985
1998
AVERAGE 70 77 -7 84
PRECIPITATION (IN)
YESTERDAY 0.00 1.03 1970 0.13 -0.13 0.32
MONTH TO DATE 0.12 0.36 -0.24 0.32
SINCE JUN 1 9.99 8.81 1.18 3.67
SINCE JAN 1 23.91 26.05 -2.14 20.97
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 5 12 -7 19
MONTH TO DATE 16 36 -20 61
SINCE JUN 1 814 652 162 914
SINCE JAN 1 932 758 174 1097
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WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 3.8
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 11:00 PM
LOWEST 35 2:00 PM
AVERAGE 63
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 99 2002
MINIMUM TEMPERATURE (F) 67 51 1976
SUNRISE AND SUNSET
AUGUST 4 2025........SUNRISE 6:14 AM EDT SUNSET 8:18 PM EDT
AUGUST 5 2025........SUNRISE 6:15 AM EDT SUNSET 8:16 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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