817
CXUS56 KSEW 011150
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
350 AM PST SUN FEB 01 2026

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...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2026...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             64   01/15/2018
                       01/20/1981
 LOW               0   01/31/1950
HIGHEST           58   01/13         MM      MM       52  01/09
LOWEST            26   01/24         MM      MM       26  01/23
                       01/25
                                                          01/26
                                                          01/28
AVG. MAXIMUM    49.0               48.0     1.0     44.9
AVG. MINIMUM    37.8               37.7     0.1     33.4
MEAN            43.4               42.8     0.6     39.1
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.4    -0.4        0
DAYS MIN <= 32     9                7.0     2.0       15
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       12.92   1953
 MINIMUM        0.58   1985
TOTALS          4.27               5.78   -1.51     1.92
DAILY AVG.      0.14               0.19   -0.05     0.06
DAYS >= .01       14               18.7    -4.7       11
DAYS >= .10       11               12.7    -1.7        5
DAYS >= .50        2                3.9    -1.9        1
DAYS >= 1.00       0                0.9    -0.9        0
GREATEST
 24 HR. TOTAL   0.70   01/04 TO 01/05

SNOWFALL (INCHES)
RECORDS
 TOTAL          57.2   1950
TOTALS           0.0                1.8    -1.8      0.0
SINCE 7/1        0.0                3.7    -3.7       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                                   0
GREATEST
 SNOW DEPTH        0                                   0
 24 HR TOTAL      MM                                  MM

DEGREE DAYS
HEATING TOTAL    662                687     -25      792
 SINCE 7/1      2182               2462    -280       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
HIGHEST WIND SPEED/DIRECTION    24/170    DATE  01/07
HIGHEST GUST SPEED/DIRECTION    36/170    DATE  01/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.71
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY         21

AVERAGE RH (PERCENT)     81

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       6
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      24     FOG W/VIS <= 1/4 MILE      8
HAZE                      0

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

$$