Climatological Report (Daily)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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CDUS41 KLWX 212134
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
534 PM EDT MON JUL 21 2025
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 21 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 86 3:51 PM 101 1991 88 -2 92
MINIMUM 72 4:37 AM 48 1966 67 5 66
AVERAGE 79 78 1 79
PRECIPITATION (IN)
TODAY 0.03 5.02 2018 0.13 -0.10 0.00
MONTH TO DATE 1.83 2.87 -1.04 2.13
SINCE JUN 1 8.76 7.17 1.59 2.82
SINCE JAN 1 22.68 24.41 -1.73 20.12
SNOWFALL (IN)
TODAY 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
TODAY 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
TODAY 14 12 2 14
MONTH TO DATE 315 250 65 354
SINCE JUN 1 636 488 148 708
SINCE JAN 1 754 594 160 891
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 6.9
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HEAVY RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 4:00 AM
LOWEST 45 4:00 PM
AVERAGE 71
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 105 2011
MINIMUM TEMPERATURE (F) 67 50 1974
SUNRISE AND SUNSET
JULY 21 2025..........SUNRISE 6:02 AM EDT SUNSET 8:30 PM EDT
JULY 22 2025..........SUNRISE 6:02 AM EDT SUNSET 8:30 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$