640
CDUS41 KLWX 270621
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
221 AM EDT SUN JUL 27 2025
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 26 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 91 2:15 PM 98 1966 88 3 85
2012
MINIMUM 72 5:18 AM 50 1976 67 5 65
AVERAGE 82 77 5 75
PRECIPITATION (IN)
YESTERDAY 0.01 0.76 1989 0.13 -0.12 0.00
MONTH TO DATE 1.85 3.52 -1.67 2.54
SINCE JUN 1 8.78 7.82 0.96 3.23
SINCE JAN 1 22.70 25.06 -2.36 20.53
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 17 12 5 10
MONTH TO DATE 386 310 76 423
SINCE JUN 1 707 548 159 777
SINCE JAN 1 825 654 171 960
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION SE (140)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SE (140)
AVERAGE WIND SPEED 3.5
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94 2:00 AM
LOWEST 56 2:00 PM
AVERAGE 75
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 98 1993
2023
MINIMUM TEMPERATURE (F) 67 52 1977
SUNRISE AND SUNSET
JULY 27 2025..........SUNRISE 6:07 AM EDT SUNSET 8:26 PM EDT
JULY 28 2025..........SUNRISE 6:07 AM EDT SUNSET 8:25 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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