038
CXUS51 KLWX 070246
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
946 PM EST TUE JAN 06 2026

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...

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             79   12/06/1998
 LOW              -4   12/25/1989
HIGHEST           60   12/29         66      -6       67
LOWEST            13   12/09         10       3       14
                       12/16
AVG. MAXIMUM    43.8               46.5    -2.7     47.4
AVG. MINIMUM    25.4               29.0    -3.6     28.7
MEAN            34.6               37.7    -3.1     38.0
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     2                2.0     0.0        0
DAYS MIN <= 32    24               21.8     2.2       20
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        6.74   1969
 MINIMUM        0.32   2007
TOTALS          1.30               3.30   -2.00     3.34
DAILY AVG.      0.04               0.11   -0.07     0.11
DAYS >= .01        7               10.2    -3.2       11
DAYS >= .10        3                6.3    -3.3        7
DAYS >= .50        1                2.5    -1.5        1
DAYS >= 1.00       0                0.7    -0.7        1
GREATEST
 24 HR. TOTAL   0.73   12/02 TO 12/02               1.52
 STORM TOTAL    0.73                                1.51
 (MM/DD(HH))

SNOWFALL (INCHES)
RECORDS
 TOTAL          24.2   1966
TOTALS           2.0                2.8    -0.8      0.1
SINCE 7/1        2.0                3.1    -1.1       MM
DAYS >= TRACE      5                1.6     3.4        5
DAYS >= 1.0        1                0.9     0.1        0
GREATEST
 SNOW DEPTH        1   12/14                          MM

DEGREE DAYS
HEATING TOTAL    934                845      89      829
 SINCE 7/1      1727               1746     -19       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1      1330               1231      99       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
HIGHEST WIND SPEED/DIRECTION    40/300
HIGHEST GUST SPEED/DIRECTION    55/310

SKY COVER
AVERAGE SKY COVER           0.67

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                4     SLEET                      1
FOG                       8     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

$$