731
CXUS56 KSEW 011037
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
337 AM PDT TUE SEP 01 2026

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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             99   08/09/1981
                       08/09/1960
 LOW              44   08/14/1955
                       08/13/1955
                       08/27/1952
HIGHEST           88   08/06         MM      MM       92  08/12
LOWEST            53   08/03         MM      MM       53  08/21
AVG. MAXIMUM    78.4               77.6     0.8     78.4
AVG. MINIMUM    57.0               57.2    -0.2     59.3
MEAN            67.7               67.4     0.3     68.8
DAYS MAX >= 90     0                1.2    -1.2        4
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.59   1975
 MINIMUM           T   2012
TOTALS          0.56               0.97   -0.41     1.14
DAILY AVG.      0.02               0.03   -0.01     0.04
DAYS >= .01        1                4.9    -3.9        3
DAYS >= .10        1                2.3    -1.3        3
DAYS >= .50        1                0.6     0.4        1
DAYS >= 1.00       0                0.1    -0.1        0
GREATEST
 24 HR. TOTAL   0.56   08/29 TO 08/29

DEGREE DAYS
HEATING TOTAL      5                 24     -19        3
 SINCE 7/1        25                 55     -30       MM
COOLING TOTAL     97                 98      -1      130
 SINCE 1/1       265                233      32       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
HIGHEST WIND SPEED/DIRECTION    24/210    DATE  08/01
HIGHEST GUST SPEED/DIRECTION    33/200    DATE  08/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.53
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             20
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      1
HAZE                      6

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

$$