110  
CDUS46 KMTR 210043  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
443 PM PST WED DEC 20 2023  
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 20 2023
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1927 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 60 1:37 PM 69 1999 58 2 53  
MINIMUM 55 8:16 AM 31 1965 44 11 45  
AVERAGE 58 51 7 49  
 
PRECIPITATION (IN)  
TODAY 1.30R 0.91 1970 0.14 1.16 0.00  
MONTH TO DATE 2.52 2.62 -0.10 3.43  
SINCE OCT 1 3.94 5.45 -1.51 5.02  
SINCE JAN 1 24.14 18.12 6.02 7.19  
 
SNOWFALL (IN)  
TODAY MM 0.0  
MONTH TO DATE T  
SINCE DEC 1 T  
SINCE JUL 1 T  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 7 14 -7 16  
MONTH TO DATE 175 265 -90 321  
SINCE DEC 1 175 265 -90 321  
SINCE JUL 1 398 773 -375 846  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 280 201 79 280    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SE (120)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 8.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 3:00 AM  
LOWEST 77 1:00 PM  
AVERAGE 82  
   
......................................................
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 68 1999  
MINIMUM TEMPERATURE (F) 44 28 1990  
 
SUNRISE AND SUNSET  
DECEMBER 20 2023......SUNRISE 7:20 AM PST SUNSET 4:54 PM PST  
DECEMBER 21 2023......SUNRISE 7:21 AM PST SUNSET 4:55 PM PST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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