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CXUS51 KLWX 031738
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
138 PM EDT MON AUG 03 2026

...................................

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF JULY 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2026

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           99   07/04         96       3       97
LOWEST            57   07/24         52       5       60
AVG. MAXIMUM    88.4               87.6     0.8     90.2
AVG. MINIMUM    69.1               66.8     2.3     70.1
MEAN            78.7               77.2     1.5     80.1
DAYS MAX >= 90    10               12.5    -2.5       18
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          5.34               4.15    1.19     2.94
DAILY AVG.      0.17               0.13    0.04     0.09
DAYS >= .01       11               11.0     0.0       15
DAYS >= .10        8                6.7     1.3        8
DAYS >= .50        5                2.7     2.3        1
DAYS >= 1.00       1                1.3    -0.3        0
GREATEST
 24 HR. TOTAL   1.44   07/09 TO 07/09               0.81
 STORM TOTAL    1.44                                0.80
 (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    435                378      57      477
 SINCE 1/1       886                722     164       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.6
HIGHEST WIND SPEED/DIRECTION    32/080
HIGHEST GUST SPEED/DIRECTION    43/080

SKY COVER
AVERAGE SKY COVER           0.59

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             11     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                       4
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                     11

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$