Climatological Report (Monthly)
Issued by NWS
Issued by NWS
000
CXUS56 KSEW 020353
CLMSEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
853 PM PDT FRI SEP 01 2023
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...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
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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
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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.
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