Climatological Report (Monthly)
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CXUS56 KSEW 011131
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
331 AM PST THU FEB 01 2024

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2024...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2024

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           61   01/28         MM      MM       59  01/05
                       01/29
                       01/30
                                                          01/14
LOWEST            15   01/12         MM      MM       24  01/30
                       01/13
AVG. MAXIMUM    46.5               48.0    -1.5     48.4
AVG. MINIMUM    36.7               37.7    -1.0     38.6
MEAN            41.6               42.8    -1.2     43.5
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     3                0.4     2.6        0
DAYS MIN <= 32     7                7.0     0.0        5
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       12.92   1953
 MINIMUM        0.58   1985
TOTALS          6.31               5.78    0.53     3.09
DAILY AVG.      0.22               0.19    0.03     0.10
DAYS >= .01       22               18.7     3.3       18
DAYS >= .10       18               12.7     5.3       10
DAYS >= .50        3                3.9    -0.9        0
DAYS >= 1.00       0                0.9    -0.9        0
GREATEST
 24 HR. TOTAL   1.13   01/27 TO 01/28

SNOWFALL (INCHES)
RECORDS
 TOTAL          57.2   1950
TOTALS             T                1.8    -1.8      0.1
SINCE 7/1          T                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    698                687      11      658
 SINCE 7/1      2297               2462    -165       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.1
HIGHEST WIND SPEED/DIRECTION    35/230    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    52/220    DATE  01/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.87
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY         26

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       5
LIGHT RAIN               25     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                2     SLEET                      0
FOG                      23     FOG W/VIS <= 1/4 MILE      2
HAZE                      6

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

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