316  
CDUS46 KMTR 200831  
CLISFD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
1231 AM PST WED DEC 20 2023  
   
...............................  
 
   
..THE SAN FRANCISCO DWTN CA CLIMATE SUMMARY FOR DECEMBER 19 2023  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1850 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 62 2:43 PM 73 1999 57 5 46  
MINIMUM 57 6:43 AM 36 1908 47 10 40  
AVERAGE 60 52 8 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.40 4.28 1866 0.16 0.24 0.00  
MONTH TO DATE 2.26 2.88 -0.62 2.75  
SINCE OCT 1 4.29 6.42 -2.13 4.11  
SINCE JAN 1 25.20 21.01 4.19 7.00  
 
DEGREE DAYS  
HEATING  
YESTERDAY 5 13 -8 22  
MONTH TO DATE 179 230 -51 281  
SINCE DEC 1 179 230 -51 281  
SINCE JUL 1 688 958 -270 1012  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 103 121 -18 110    
...............................................................  
 
THE SAN FRANCISCO DWTN CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 72 1999  
MINIMUM TEMPERATURE (F) 47 34 1990  
 
SUNRISE AND SUNSET  
DECEMBER 20 2023......SUNRISE 7:21 AM PST SUNSET 4:54 PM PST  
DECEMBER 21 2023......SUNRISE 7:21 AM PST SUNSET 4:54 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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