444
CDUS41 KLWX 170631
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
231 AM EDT FRI JUL 17 2026
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 16 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 96 3:55 PM 104 1988 88 8 90
MINIMUM 81 5:35 AM 57 1966 67 14 71
1967
1991
AVERAGE 89 78 11 81
PRECIPITATION (IN)
YESTERDAY 0.00 1.65 1989 0.14 -0.14 0.49
MONTH TO DATE 3.69 2.18 1.51 1.79
SINCE JUN 1 7.98 6.48 1.50 8.72
SINCE JAN 1 22.90 23.72 -0.82 22.64
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 24 12 12 16
MONTH TO DATE 260 190 70 236
SINCE JUN 1 538 428 110 557
SINCE JAN 1 711 534 177 675
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WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 7.2
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 69 2:00 AM
LOWEST 45 11:00 PM
AVERAGE 57
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 100 1988
1997
MINIMUM TEMPERATURE (F) 67 55 1976
2014
SUNRISE AND SUNSET
JULY 17 2026..........SUNRISE 5:58 AM EDT SUNSET 8:33 PM EDT
JULY 18 2026..........SUNRISE 5:59 AM EDT SUNSET 8:33 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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