636  
CDUS46 KSEW 190116  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
616 PM PDT MON JUN 18 2018  
 
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR JUNE 18 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 87 433 PM 94 1982 70 17 71  
MINIMUM 63 455 AM 43 1954 52 11 55  
AVERAGE 75 61 14 63  
 
PRECIPITATION (IN)  
TODAY 0.00 0.41 2011 0.05 -0.05 T  
MONTH TO DATE 0.43 1.07 -0.64 1.52  
SINCE OCT 1 37.82 33.91 3.91 48.80  
SINCE JAN 1 18.96 18.51 0.45 28.40  
 
DEGREE DAYS  
HEATING  
TODAY 0 5 -5 2  
MONTH TO DATE 81 101 -20 85  
SINCE JUN 1 81 101 -20 85  
SINCE JUL 1 4223 4654 -431 4492  
 
COOLING  
TODAY 10 1 9 0  
MONTH TO DATE 20 6 14 7  
SINCE JUN 1 20 6 14 7  
SINCE JAN 1 37 12 25 26    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (190)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 6.4  
 
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 67 300 AM  
LOWEST 30 300 PM  
AVERAGE 49  
   
......................................................
 
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 92 1982  
MINIMUM TEMPERATURE (F) 52 43 1955  
1951  
 
 
SUNRISE AND SUNSET  
JUNE 18 2018..........SUNRISE 512 AM PDT SUNSET 909 PM PDT  
JUNE 19 2018..........SUNRISE 512 AM PDT SUNSET 909 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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