406
CDUS41 KLWX 100630
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
230 AM EDT FRI JUL 10 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 9 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 87 2:03 PM 99 1988 88 -1 91
1993
MINIMUM 72 11:59 PM 48 1984 67 5 72
AVERAGE 80 77 3 82
PRECIPITATION (IN)
YESTERDAY 1.44 2.23 1970 0.13 1.31 0.22
MONTH TO DATE 2.74 1.22 1.52 0.84
SINCE JUN 1 7.03 5.52 1.51 7.77
SINCE JAN 1 21.95 22.76 -0.81 21.69
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 17
MONTH TO DATE 161 106 55 127
SINCE JUN 1 439 344 95 448
SINCE JAN 1 612 450 162 566
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 5.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 9:00 PM
LOWEST 65 2:00 PM
AVERAGE 83
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 99 1988
1993
MINIMUM TEMPERATURE (F) 67 53 1963
SUNRISE AND SUNSET
JULY 10 2026..........SUNRISE 5:53 AM EDT SUNSET 8:37 PM EDT
JULY 11 2026..........SUNRISE 5:54 AM EDT SUNSET 8:36 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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