550
CDUS41 KLWX 300622
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
222 AM EDT THU JUL 30 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 29 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 2:48 PM 103 2011 88 -4 95
MINIMUM 69 5:24 AM 52 2014 67 2 70
AVERAGE 77 77 0 83
PRECIPITATION (IN)
YESTERDAY 0.00 0.92 2001 0.12 -0.12 0.00
MONTH TO DATE 5.34 3.89 1.45 2.65
SINCE JUN 1 9.63 8.19 1.44 9.58
SINCE JAN 1 24.55 25.43 -0.88 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 12 12 0 18
MONTH TO DATE 411 346 65 440
SINCE JUN 1 689 584 105 761
SINCE JAN 1 862 690 172 879
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 10.6
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 12:00 AM
LOWEST 45 1:00 PM
AVERAGE 66
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 98 1988
MINIMUM TEMPERATURE (F) 67 48 2014
SUNRISE AND SUNSET
JULY 30 2026..........SUNRISE 6:09 AM EDT SUNSET 8:23 PM EDT
JULY 31 2026..........SUNRISE 6:10 AM EDT SUNSET 8:22 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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