852
CXUS51 KLWX 011958
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
258 PM EST SAT FEB 01 2025

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

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

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             79   01/26/2024
 LOW             -18   01/22/1984
HIGHEST           59   01/29         63      -4       79
LOWEST             4   01/23          2       2        7
AVG. MAXIMUM    38.6               42.6    -4.0     45.5
AVG. MINIMUM    22.1               25.2    -3.1     28.3
MEAN            30.4               33.9    -3.5     36.9
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     9                5.6     3.4        6
DAYS MIN <= 32    27               24.3     2.7       21
DAYS MIN <= 0      0                0.3    -0.3        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        6.61   1979
 MINIMUM        0.40   1981
TOTALS          2.00               2.94   -0.94     6.00
DAILY AVG.      0.06               0.09   -0.03     0.19
DAYS >= .01        9               10.3    -1.3       12
DAYS >= .10        3                5.9    -2.9        9
DAYS >= .50        2                2.0     0.0        4
DAYS >= 1.00       0                0.6    -0.6        2
GREATEST
 24 HR. TOTAL   0.85   01/30 TO 01/31               1.76
 STORM TOTAL    0.84                                1.76
 (MM/DD(HH))

SNOWFALL (INCHES)
RECORDS
 TOTAL          30.9   1996
TOTALS          10.5                6.9     3.6      9.5
SINCE 7/1       10.6               10.0     0.6       MM
DAYS >= TRACE      8                3.1     4.9        7
DAYS >= 1.0        3                1.6     1.4        2
GREATEST
 SNOW DEPTH        5   01/11                           6

DEGREE DAYS
HEATING TOTAL   1068                964     104      867
 SINCE 7/1      2565               2702    -137       MM
COOLING TOTAL      0                  0       0        3
 SINCE 1/1         0                  0       0       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.9
HIGHEST WIND SPEED/DIRECTION    33/300
                                33/300
HIGHEST GUST SPEED/DIRECTION    48/330

SKY COVER
AVERAGE SKY COVER           0.51

AVERAGE RH (PERCENT)     58

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               1
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                5     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW                7     SLEET                      2
FOG                       5     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

$$