264  
CDUS46 KSEW 240118  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
618 PM PDT THU MAR 23 2017  
 
   
...............................
 
 
   
..THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MARCH 23 2017
 
 
VALID TODAY AS OF 0600 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 58 334 PM 68 1979 55 3 51  
MINIMUM 39 612 AM 28 1954 40 -1 45  
AVERAGE 49 47 2 48  
 
PRECIPITATION (IN)  
TODAY T 0.94 1971 0.12 -0.12 0.23  
MONTH TO DATE 5.61 2.83 2.78 5.21  
SINCE OCT 1 39.08 27.30 11.78 43.02  
SINCE JAN 1 18.68 11.90 6.78 18.63  
 
SNOWFALL (IN)  
TODAY 0.0 T 1985 0.0  
MONTH TO DATE T 0.0  
SINCE OCT 1 11.2 T  
SINCE JUL 1 11.2 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 16 18 -2 17  
MONTH TO DATE 448 437 11 366  
SINCE MAR 1 448 437 11 366  
SINCE JUL 1 3621 3691 -70 3210  
 
COOLING  
TODAY 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 7 RESULTANT WIND DIRECTION S (180)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 8.9  
 
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 400 AM  
LOWEST 43 300 PM  
AVERAGE 68  
   
......................................................
 
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 55 68 2010  
MINIMUM TEMPERATURE (F) 40 30 1975  
1965  
 
 
SUNRISE AND SUNSET  
MARCH 23 2017.........SUNRISE 705 AM PDT SUNSET 727 PM PDT  
MARCH 24 2017.........SUNRISE 703 AM PDT SUNSET 728 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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