406
CXUS51 KLWX 011954
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
354 PM EDT TUE AUG 01 2023
...............................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF JULY 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 105 07/22/2011
LOW 41 07/01/1988
HIGHEST 98 07/27 96 2 96
07/28
07/29
LOWEST 61 07/23 52 9 60
AVG. MAXIMUM 91.2 87.6 3.6 88.3
AVG. MINIMUM 69.0 66.8 2.2 67.9
MEAN 80.1 77.2 2.9 78.1
DAYS MAX >= 90 21 12.5 8.5 13
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 11.21 2018
MINIMUM 0.94 1983
TOTALS 5.09 4.15 0.94 5.23
DAILY AVG. 0.16 0.13 0.03 0.17
DAYS >= .01 14 11.0 3.0 16
DAYS >= .10 9 6.7 2.3 11
DAYS >= .50 5 2.7 2.3 3
DAYS >= 1.00 0 1.3 -1.3 2
GREATEST
24 HR. TOTAL 0.96 07/19 TO 07/19 2.48
STORM TOTAL 0.96 1.48
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 MM
DAYS >= TRACE 0 0.0 0.0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
DEGREE DAYS
HEATING TOTAL 0 0 0 0
SINCE 7/1 0 0 0 MM
COOLING TOTAL 473 378 95 416
SINCE 1/1 729 722 7 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.0
HIGHEST WIND SPEED/DIRECTION 38/020
HIGHEST GUST SPEED/DIRECTION 59/020
SKY COVER
AVERAGE SKY COVER 0.53
AVERAGE RH (PERCENT) 68
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 15 MIXED PRECIP 0
HEAVY RAIN 5 RAIN 7
LIGHT RAIN 16 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 14 FOG W/VIS <= 1/4 MILE 0
HAZE 9
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
AT DULLES AIRPORT, JUL 2023 WAS THE FOURTH WARMEST JUL ON RECORD WITH AN AVERAGE
TEMPERATURE OF 80.1F DEGREES. ONLY 2020, 2011, AND 2012 WERE WARMER THAN 2023. AS
FOR PRECIPITATION, JUL 2023 WAS A LITTLE ABOVE NORMAL FINISHING AS THE FIFTEENTH
WETTEST ON RECORD.
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