941  
CDUS46 KSEW 220832  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
132 AM PDT SUN APR 22 2018  
 
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR APRIL 21 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1945 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 56 530 PM 76 1982 59 -3 66  
MINIMUM 45 549 AM 29 1951 43 2 43  
AVERAGE 51 51 0 55  
 
PRECIPITATION (IN)  
YESTERDAY 0.03 0.87 2010 0.09 -0.06 0.00  
MONTH TO DATE 5.37 2.03 3.34 3.28  
SINCE OCT 1 36.95 30.22 6.73 44.07  
SINCE JAN 1 18.09 14.82 3.27 23.67  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 4.0 11.2  
SINCE JUL 1 4.0 11.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 14 14 0 10  
MONTH TO DATE 331 322 9 302  
SINCE MAR 1 903 896 7 882  
SINCE JUL 1 3936 4150 -214 4055  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION S (190)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 12.3  
 
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 400 AM  
LOWEST 50 600 PM  
AVERAGE 66  
   
......................................................
 
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 60 78 2005  
1977  
MINIMUM TEMPERATURE (F) 43 35 1972  
1964  
1950  
 
 
SUNRISE AND SUNSET  
APRIL 22 2018.........SUNRISE 608 AM PDT SUNSET 809 PM PDT  
APRIL 23 2018.........SUNRISE 606 AM PDT SUNSET 810 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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