Climatological Report (Monthly) Issued by NWS
000
CXUS56 KSEW 011033
CLMSEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
333 AM PDT TUE AUG 01 2023
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...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JULY 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 103 07/29/2009
LOW 43 07/02/1954
07/24/1953
07/04/1949
HIGHEST 91 07/05 MM MM 95 07/29
07/15
07/30
07/31
LOWEST 54 07/10 MM MM 51 07/04
07/12
07/13
AVG. MAXIMUM 80.1 77.4 2.7 80.1
AVG. MINIMUM 57.0 56.8 0.2 58.0
MEAN 68.5 67.1 1.4 69.0
DAYS MAX >= 90 2 1.8 0.2 6
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 0.09 0.60 -0.51 0.18
DAILY AVG. 0.00 0.02 -0.02 0.01
DAYS >= .01 1 4.7 -3.7 5
DAYS >= .10 0 1.8 -1.8 0
DAYS >= .50 0 0.3 -0.3 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.09 07/24 TO 07/24
DEGREE DAYS
HEATING TOTAL 2 31 -29 17
SINCE 7/1 2 36 -34 MM
COOLING TOTAL 119 96 23 146
SINCE 1/1 183 135 48 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.3
HIGHEST WIND SPEED/DIRECTION 21/030 DATE 07/01
HIGHEST GUST SPEED/DIRECTION 28/230 DATE 07/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.38
NUMBER OF DAYS FAIR 14
NUMBER OF DAYS PC 16
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 57
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 1
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 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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