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000
CXUS56 KSEW 020353
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
853 PM PDT FRI SEP 01 2023

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2023

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           95   08/15         MM      MM       91  08/08
                       08/16
LOWEST            52   08/19         MM      MM       53  08/03
                                                          08/28
AVG. MAXIMUM    79.9               77.6     2.3     80.9
AVG. MINIMUM    59.9               57.2     2.7     59.1
MEAN            69.9               67.4     2.5     70.0
DAYS MAX >= 90     4                1.2     2.8        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          0.27               0.97   -0.70     0.05
DAILY AVG.      0.01               0.03   -0.02     0.00
DAYS >= .01        8                4.9     3.1        2
DAYS >= .10        1                2.3    -1.3        0
DAYS >= .50        0                0.6    -0.6        0
DAYS >= 1.00       0                0.1    -0.1        0
GREATEST
 24 HR. TOTAL   0.12   08/29 TO 08/29

DEGREE DAYS
HEATING TOTAL     10                 24     -14        3
 SINCE 7/1        12                 55     -43       MM
COOLING TOTAL    169                 98      71      167
 SINCE 1/1       352                233     119       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    22/210    DATE  08/09
HIGHEST GUST SPEED/DIRECTION    28/200    DATE  08/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.49
NUMBER OF DAYS FAIR           11
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                9     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                      8

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

$$