Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 270623
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
223 AM EDT MON JUL 27 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 26 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 84 5:17 PM 98 1966 88 -4 91
2012
MINIMUM 64 5:11 AM 50 1976 67 -3 72
AVERAGE 74 77 -3 82
PRECIPITATION (IN)
YESTERDAY T 0.76 1989 0.13 -0.13 0.01
MONTH TO DATE 5.34 3.52 1.82 1.85
SINCE JUN 1 9.63 7.82 1.81 8.78
SINCE JAN 1 24.55 25.06 -0.51 22.70
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 1 13 -12 15
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 9 12 -3 17
MONTH TO DATE 371 310 61 386
SINCE JUN 1 649 548 101 707
SINCE JAN 1 822 654 168 825
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 2.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 4:00 AM
LOWEST 55 2:00 PM
AVERAGE 74
..........................................................
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 2026..........SUNRISE 6:06 AM EDT SUNSET 8:26 PM EDT
JULY 28 2026..........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.
$$