179  
CDUS46 KMTR 210830  
CLISFD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
130 AM PDT SUN SEP 21 2025  
   
...............................  
 
   
..THE SAN FRANCISCO DWTN CA CLIMATE SUMMARY FOR SEPTEMBER 20 2025  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1850 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 68 11:43 AM 97 1939 70 -2 65  
MINIMUM 60 6:43 AM 49 1911 56 4 55  
AVERAGE 64 63 1 60  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.20 1973 0.00 0.00 0.00  
MONTH TO DATE 0.08 0.04 0.04 0.00  
SINCE OCT 1 19.96 22.83 -2.87 25.76  
SINCE JAN 1 9.76 14.53 -4.77 19.08  
 
DEGREE DAYS  
HEATING  
YESTERDAY 1 3 -2 5  
MONTH TO DATE 22 62 -40 74  
SINCE SEP 1 22 62 -40 74  
SINCE JUL 1 267 332 -65 262  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 14 20 -6 6  
SINCE SEP 1 14 20 -6 6  
SINCE JAN 1 33 70 -37 34    
...............................................................  
 
THE SAN FRANCISCO DWTN CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 99 1928  
MINIMUM TEMPERATURE (F) 56 50 1886  
 
SUNRISE AND SUNSET  
SEPTEMBER 21 2025.....SUNRISE 6:57 AM PDT SUNSET 7:08 PM PDT  
SEPTEMBER 22 2025.....SUNRISE 6:58 AM PDT SUNSET 7:06 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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