372  
CDUS46 KSEW 290831  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
131 AM PDT MON MAY 29 2017  
 
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 28 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1945 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 86 416 PM 92 1983 67 19 62  
MINIMUM 56 1159 PM 38 1954 50 6 49  
AVERAGE 71 58 13 56  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.88 1948 0.07 -0.07 0.10  
MONTH TO DATE 2.16 1.75 0.41 0.94  
SINCE OCT 1 47.16 32.65 14.51 45.46  
SINCE JAN 1 26.76 17.25 9.51 21.07  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 7 -7 9  
MONTH TO DATE 215 263 -48 155  
SINCE MAR 1 1219 1277 -58 887  
SINCE JUL 1 4392 4531 -139 3731  
 
COOLING  
YESTERDAY 6 0 6 0  
MONTH TO DATE 19 0 19 11  
SINCE MAR 1 19 0 19 25  
SINCE JAN 1 19 0 19 25    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION NW (320)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 6.2  
 
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 77 400 AM  
LOWEST 27 400 PM  
AVERAGE 52  
   
......................................................
 
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 85 1973  
MINIMUM TEMPERATURE (F) 50 35 1951  
 
 
SUNRISE AND SUNSET  
MAY 29 2017...........SUNRISE 518 AM PDT SUNSET 856 PM PDT  
MAY 30 2017...........SUNRISE 517 AM PDT SUNSET 857 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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