National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
CXUS51 KLWX 041906
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
306 PM EDT MON SEP 04 2023

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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            104   08/20/1983
 LOW              38   08/29/1982
HIGHEST           97   08/25         95       2       97
LOWEST            54   08/19         50       4       57
AVG. MAXIMUM    88.1               86.3     1.8     88.4
AVG. MINIMUM    66.4               65.2     1.2     66.7
MEAN            77.2               75.7     1.5     77.5
DAYS MAX >= 90    12                9.3     2.7       15
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       10.71   1984
 MINIMUM        0.44   1998
TOTALS          1.85               3.53   -1.68     2.30
DAILY AVG.      0.06               0.11   -0.05     0.07
DAYS >= .01        8                9.3    -1.3       12
DAYS >= .10        4                5.6    -1.6        4
DAYS >= .50        1                2.2    -1.2        2
DAYS >= 1.00       0                1.1    -1.1        0
GREATEST
 24 HR. TOTAL   0.93   08/07 TO 08/07               0.99
 STORM TOTAL    0.93                                0.96
 (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                  1      -1        0
 SINCE 7/1         0                  0       0       MM
COOLING TOTAL    386                334      52      396
 SINCE 1/1      1115               1056      59       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.4
HIGHEST WIND SPEED/DIRECTION    28/300
HIGHEST GUST SPEED/DIRECTION    41/150

SKY COVER
AVERAGE SKY COVER           0.58

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       2
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      0
HAZE                      5

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

&&

AUGUST AVERAGED SLIGHTLY WARMER THAN NORMAL. THE DRY WEATHER OF RECENT MONTHS CONTINUED,
WITH WELL BELOW NORMAL PRECIPITATION OBSERVED. AFTER ANOTHER DRY MONTH, YEAR-TO-DATE
RAINFALL NOW STANDS AT 10.37 INCHES BELOW NORMAL.

$$

DHOF