Climatological Report (Monthly)
Issued by NWS Seattle/Tacoma, WA

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CXUS56 KSEW 011050
CLMSEW

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
350 AM PDT SUN OCT 01 2023

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

...THE SEATTLE WA WFO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1894 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             93   09/03/1988
 LOW              40   09/30/2019
HIGHEST           86   09/02         MM      MM       88  09/10
LOWEST            44   09/30         MM      MM       48  09/19
AVG. MAXIMUM    71.1               71.3    -0.2     75.2
AVG. MINIMUM    53.1               53.2    -0.1     55.6
MEAN            62.1               62.3    -0.2     65.4
DAYS MAX >= 90     0                0.1    -0.1        0
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        5.01   2013
 MINIMUM        0.02   1991
TOTALS          3.69               1.74    1.95     0.13
DAILY AVG.      0.12               0.06    0.06     0.00
DAYS >= .01       11                8.8     2.2        3
DAYS >= .10        7                4.6     2.4        0
DAYS >= .50        3                1.0     2.0        0
DAYS >= 1.00       1                0.1     0.9        0

DEGREE DAYS
HEATING TOTAL    101                106      -5       24
 SINCE 7/1       106                162     -56       MM
COOLING TOTAL     23                 24      -1       45
 SINCE 1/1       341                210     131       MM
................................................................


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN               11     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                      0

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

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