773
CXUS56 KSEW 011031
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
331 AM PDT FRI AUG 01 2025

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JULY 2025...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            103   07/29/2009
 LOW              43   07/02/1954
                       07/24/1953
                       07/04/1949
HIGHEST           94   07/16         MM      MM       98  07/09
LOWEST            51   07/20         MM      MM       52  07/26
AVG. MAXIMUM    78.9               77.4     1.5     81.4
AVG. MINIMUM    57.0               56.8     0.2     58.2
MEAN            67.9               67.1     0.8     69.8
DAYS MAX >= 90     2                1.8     0.2        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        2.39   1983
 MINIMUM           T   2021
TOTALS          0.01               0.60   -0.59     0.16
DAILY AVG.      0.00               0.02   -0.02     0.01
DAYS >= .01        1                4.7    -3.7        2
DAYS >= .10        0                1.8    -1.8        1
DAYS >= .50        0                0.3    -0.3        0
DAYS >= 1.00       0                0.0     0.0        0
GREATEST
 24 HR. TOTAL   0.01   07/25 TO 07/25

DEGREE DAYS
HEATING TOTAL     21                 31     -10        7
 SINCE 7/1        21                 36     -15       MM
COOLING TOTAL    119                 96      23      164
 SINCE 1/1       164                135      29       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.2
HIGHEST WIND SPEED/DIRECTION    24/030    DATE  07/14
HIGHEST GUST SPEED/DIRECTION    29/040    DATE  07/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.45
NUMBER OF DAYS FAIR           14
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

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

$$