923  
CDUS46 KSEW 210834  
CLISEW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
133 AM PDT SAT APR 21 2018  
 
   
...............................
 
 
   
..THE SEATTLE WA WFO CLIMATE SUMMARY FOR APRIL 20 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1986 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR LAST  
VALUE (LST) VALUE YEAR    
................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 63 MM 80 2016 61  
MINIMUM 41 MM 35 2008 45  
AVERAGE 52 53  
 
PRECIPITATION (IN)  
YESTERDAY T 0.45 1997 0.02  
MONTH TO DATE 5.33 3.18  
SINCE OCT 1 36.55 43.25  
SINCE JAN 1 19.68 21.53  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 4.0 3.6  
SINCE JUL 1 4.0 3.6  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 13 12  
MONTH TO DATE 321 284  
SINCE MAR 1 896 849  
SINCE JUL 1 3891 3929  
 
COOLING  
YESTERDAY 0 0  
MONTH TO DATE 0 0  
SINCE MAR 1 0 0  
SINCE JAN 1 0 0    
................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED MM HIGHEST WIND DIRECTION MM  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED MM  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
 
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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