636  
CDUS46 KSEW 210126  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
626 PM PDT SAT MAY 20 2023  
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 20 2023
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1945 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 78 343 PM 92 1963 67 11 61  
MINIMUM 54 458 AM 40 1960 50 4 41  
AVERAGE 66 58 8 51  
 
PRECIPITATION (IN)  
TODAY 0.01 0.56 2007 0.05 -0.04 0.00  
MONTH TO DATE 0.92 1.26 -0.34 3.18  
SINCE OCT 1 27.68 34.09 -6.41 41.69  
SINCE JAN 1 12.79 18.15 -5.36 21.59  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 8.1 9.2  
SINCE JUL 1 8.1 9.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 7 -7 14  
MONTH TO DATE 92 174 -82 280  
SINCE MAR 1 1170 1143 27 1362  
SINCE JUL 1 4257 4190 67 4619  
 
COOLING  
TODAY 1 0 1 0  
MONTH TO DATE 31 0 31 0  
SINCE MAR 1 31 1 30 0  
SINCE JAN 1 31 1 30 0    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION W (290)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 500 AM  
LOWEST 46 400 PM  
AVERAGE 68  
   
......................................................
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 93 1963  
MINIMUM TEMPERATURE (F) 50 39 1960  
 
SUNRISE AND SUNSET  
MAY 20 2023...........SUNRISE 527 AM PDT SUNSET 846 PM PDT  
MAY 21 2023...........SUNRISE 526 AM PDT SUNSET 847 PM PDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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