841
CXUS56 KSEW 011044
CLMSEW
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
344 AM PDT THU OCT 01 2026
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...THE SEATTLE WA WFO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1894 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 93 09/03/1988
LOW 40 09/30/2019
HIGHEST 81 09/09 MM MM 92 09/16
LOWEST 44 09/28 MM MM 49 09/19
AVG. MAXIMUM 70.0 71.3 -1.3 75.1
AVG. MINIMUM 53.1 53.2 -0.1 55.6
MEAN 61.6 62.3 -0.7 65.3
DAYS MAX >= 90 0 0.1 -0.1 1
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 1.57 1.74 -0.17 0.97
DAILY AVG. 0.05 0.06 -0.01 0.03
DAYS >= .01 9 8.8 0.2 5
DAYS >= .10 4 4.6 -0.6 3
DAYS >= .50 2 1.0 1.0 1
DAYS >= 1.00 0 0.1 -0.1 0
DEGREE DAYS
HEATING TOTAL 102 106 -4 32
SINCE 7/1 118 162 -44 MM
COOLING TOTAL 4 24 -20 50
SINCE 1/1 289 210 79 MM
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WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 2 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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