Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 290623
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
223 AM EDT WED JUL 29 2026
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 28 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 89 2:42 PM 99 1993 88 1 93
MINIMUM 71 5:01 AM 47 1977 67 4 72
AVERAGE 80 77 3 83
PRECIPITATION (IN)
YESTERDAY T 1.65 2000 0.13 -0.13 0.00
MONTH TO DATE 5.34 3.77 1.57 2.65
SINCE JUN 1 9.63 8.07 1.56 9.58
SINCE JAN 1 24.55 25.31 -0.76 23.50
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 15 12 3 18
MONTH TO DATE 399 334 65 422
SINCE JUN 1 677 572 105 743
SINCE JAN 1 850 678 172 861
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 7.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 91 11:00 PM
LOWEST 59 4:00 PM
AVERAGE 75
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 103 2011
MINIMUM TEMPERATURE (F) 67 52 2014
SUNRISE AND SUNSET
JULY 29 2026..........SUNRISE 6:08 AM EDT SUNSET 8:24 PM EDT
JULY 30 2026..........SUNRISE 6:09 AM EDT SUNSET 8:23 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$