529  
CDUS46 KMTR 230045  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
545 PM PDT THU MAY 22 2025  
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR MAY 22 2025
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1927 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 65 1:41 PM 83 1954 69 -4 68  
MINIMUM 52 5:39 AM 44 1952 52 0 54  
AVERAGE 59 60 -1 61  
 
PRECIPITATION (IN)  
TODAY 0.00 0.20 1958 0.01 -0.01 0.00  
MONTH TO DATE 0.11 0.37 -0.26 0.95  
SINCE OCT 1 16.11 19.28 -3.17 20.13  
SINCE JAN 1 7.55 12.31 -4.76 14.80  
 
SNOWFALL (IN)  
TODAY MM 0.0  
MONTH TO DATE T  
SINCE MAR 1 T  
SINCE JUL 1 T  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 6 5 1 4  
MONTH TO DATE 119 129 -10 96  
SINCE MAR 1 673 659 14 585  
SINCE JUL 1 2206 2338 -132 1726  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 2 0 2 10  
SINCE MAR 1 5 6 -1 11  
SINCE JAN 1 5 6 -1 11    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 21 RESULTANT WIND DIRECTION W (280)  
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 21.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 2:00 AM  
LOWEST 47 12:00 PM  
AVERAGE 65  
   
......................................................
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 88 1982  
2000  
MINIMUM TEMPERATURE (F) 52 46 1954  
 
SUNRISE AND SUNSET  
MAY 22 2025...........SUNRISE 5:55 AM PDT SUNSET 8:18 PM PDT  
MAY 23 2025...........SUNRISE 5:54 AM PDT SUNSET 8:19 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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