071
CXUS56 KSEW 011036
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
336 AM PDT FRI MAY 01 2026

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF APRIL 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             89   04/18/2016
 LOW              29   04/05/1975
                       04/01/1953
                       04/07/1952
HIGHEST           75   04/30         MM      MM       72  04/24
LOWEST            36   04/15         MM      MM       37  04/13
                       04/16
AVG. MAXIMUM    60.8               59.3     1.5     60.8
AVG. MINIMUM    43.9               43.3     0.6     43.4
MEAN            52.4               51.3     1.1     52.1
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.1    -0.1        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        6.53   1991
 MINIMUM        0.33   1956
TOTALS          2.77               3.18   -0.41     2.55
DAILY AVG.      0.09               0.11   -0.02     0.09
DAYS >= .01        8               15.0    -7.0       11
DAYS >= .10        4                8.7    -4.7        6
DAYS >= .50        2                1.5     0.5        1
DAYS >= 1.00       1                0.3     0.7        0
GREATEST
 24 HR. TOTAL   1.09   04/14 TO 04/15

SNOWFALL (INCHES)
RECORDS
 TOTAL           2.3   1972
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        3.0                6.3    -3.3       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                                   0
GREATEST
 SNOW DEPTH        0                                   0
 24 HR TOTAL      MM                                  MM

DEGREE DAYS
HEATING TOTAL    371                412     -41      381
 SINCE 7/1      3706               4016    -310       MM
COOLING TOTAL      0                  1      -1        0
 SINCE 1/1         0                  1      -1       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    25/340    DATE  04/24
HIGHEST GUST SPEED/DIRECTION    35/200    DATE  04/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.63
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       8     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.

$$