780  
CDUS46 KSEW 290826  
CLISEA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SEATTLE  
126 AM PDT SUN SEP 29 2024  
   
...............................  
 
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 28 2024...  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1945 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 62 224 PM 86 2017 68 -6 63  
MINIMUM 49 502 AM 38 1946 51 -2 52  
1950  
AVERAGE 56 59 -3 58  
 
PRECIPITATION (IN)  
YESTERDAY T 1.71 2013 0.07 -0.07 0.13  
MONTH TO DATE 0.62 1.46 -0.84 3.44  
SINCE OCT 1 35.72 39.19 -3.47 32.71  
SINCE JAN 1 18.57 23.25 -4.68 17.82  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0  
MONTH TO DATE 0.0 0.0  
SINCE OCT 1 0.3 8.1  
SINCE JUL 1 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 9 6 3 7  
MONTH TO DATE 90 91 -1 86  
SINCE SEP 1 90 91 -1 86  
SINCE JUL 1 128 146 -18 98  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 42 30 12 26  
SINCE SEP 1 42 30 12 26  
SINCE JAN 1 315 263 52 378    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION N (20)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 7.2  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 500 AM  
LOWEST 54 300 PM  
AVERAGE 74  
   
......................................................  
 
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 81 1992  
1993  
MINIMUM TEMPERATURE (F) 51 37 1954  
 
SUNRISE AND SUNSET  
SEPTEMBER 29 2024.....SUNRISE 706 AM PDT SUNSET 651 PM PDT  
SEPTEMBER 30 2024.....SUNRISE 708 AM PDT SUNSET 649 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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