972  
CDUS46 KMTR 240038  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
538 PM PDT FRI MAY 23 2025  
   
...............................  
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR MAY 23 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 61 1:10 PM 88 1982 69 -8 66  
2000  
MINIMUM 52 6:36 AM 46 1954 52 0 52  
AVERAGE 57 61 -4 59  
 
PRECIPITATION (IN)  
TODAY 0.00 0.21 1997 0.02 -0.02 0.00  
MONTH TO DATE 0.11 0.39 -0.28 0.95  
SINCE OCT 1 16.11 19.30 -3.19 20.13  
SINCE JAN 1 7.55 12.33 -4.78 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 8 5 3 6  
MONTH TO DATE 127 134 -7 102  
SINCE MAR 1 681 664 17 591  
SINCE JUL 1 2214 2343 -129 1732  
 
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 18 RESULTANT WIND DIRECTION W (270)  
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 18.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 4:00 AM  
LOWEST 62 11:00 AM  
AVERAGE 74  
   
......................................................  
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 91 1982  
MINIMUM TEMPERATURE (F) 52 45 1953  
 
SUNRISE AND SUNSET  
MAY 23 2025...........SUNRISE 5:54 AM PDT SUNSET 8:19 PM PDT  
MAY 24 2025...........SUNRISE 5:53 AM PDT SUNSET 8:20 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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