502  
CDUS46 KSEW 200833  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE WA  
1233 AM PST TUE FEB 20 2018  
 
   
...............................
 
 
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR FEBRUARY 19 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 37 221 PM 67 1977 50 -13 47  
MINIMUM 28 745 AM 22 1990 37 -9 40  
1986  
AVERAGE 33 44 -11 44  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.76 1975 0.12 -0.12 0.06  
MONTH TO DATE 1.65 2.41 -0.76 8.06  
SINCE OCT 1 28.63 23.38 5.25 32.68  
SINCE JAN 1 9.77 7.98 1.79 12.28  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.6 1949 0.0  
MONTH TO DATE T 7.1  
SINCE OCT 1 3.0 11.1  
SINCE JUL 1 3.0 11.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 32 21 11 21  
MONTH TO DATE 405 417 -12 431  
SINCE DEC 1 1789 1883 -94 2097  
SINCE JUL 1 2778 3066 -288 2948  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION N (350)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 10.6  
 
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 58 1200 AM  
LOWEST 32 1200 PM  
AVERAGE 45  
   
......................................................
 
 
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 62 1977  
MINIMUM TEMPERATURE (F) 37 25 1955  
 
 
SUNRISE AND SUNSET  
FEBRUARY 20 2018......SUNRISE 706 AM PST SUNSET 541 PM PST  
FEBRUARY 21 2018......SUNRISE 704 AM PST SUNSET 542 PM PST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab WA Page Main Text Page