897  
CDUS46 KMTR 220834  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
134 AM PDT FRI SEP 22 2023  
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 2023
 
 
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)  
YESTERDAY  
MAXIMUM 74 3:08 PM 95 2003 75 -1 74  
MINIMUM 57 6:39 AM 45 1955 56 1 60  
AVERAGE 66 65 1 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.23 2013 0.00 0.00 0.16  
MONTH TO DATE T 0.03 -0.03 0.27  
SINCE OCT 1 31.42 19.60 11.82 18.45  
SINCE JAN 1 20.17 12.63 7.54 2.17  
 
SNOWFALL (IN)  
YESTERDAY MM 0.0  
MONTH TO DATE T  
SINCE SEP 1 T  
SINCE JUL 1 T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 2 -2 0  
MONTH TO DATE 0 26 -26 6  
SINCE SEP 1 0 26 -26 6  
SINCE JUL 1 47 128 -81 67  
 
COOLING  
YESTERDAY 1 2 -1 2  
MONTH TO DATE 35 42 -7 90  
SINCE SEP 1 35 42 -7 90  
SINCE JAN 1 174 152 22 243    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 6.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 12:00 AM  
LOWEST 48 3:00 PM  
AVERAGE 62  
   
......................................................
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 91 1946  
MINIMUM TEMPERATURE (F) 56 48 1981  
 
SUNRISE AND SUNSET  
SEPTEMBER 22 2023.....SUNRISE 6:57 AM PDT SUNSET 7:07 PM PDT  
SEPTEMBER 23 2023.....SUNRISE 6:58 AM PDT SUNSET 7:05 PM PDT  
 
- 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 CA Page Main Text Page