485  
CDUS46 KMTR 130831  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
1230 AM PST FRI DEC 13 2019  
 
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 12 2019
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1927 TO 2019  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 65 1142 AM 75 1958 57 8 62  
MINIMUM 56 1159 PM 29 1972 45 11 47  
AVERAGE 61 51 10 55  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.16 2006 0.12 -0.12 0.00  
MONTH TO DATE 2.18 1.37 0.81 0.51  
SINCE OCT 1 3.47 4.70 -1.23 3.74  
SINCE JAN 1 21.96 17.99 3.97 14.55  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0  
MONTH TO DATE 0.0  
SINCE DEC 1 0.0  
SINCE JUL 1 0.0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 4 14 -10 10  
MONTH TO DATE 97 162 -65 155  
SINCE DEC 1 97 162 -65 155  
SINCE JUL 1 466 726 -260 682  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 384 164 220 65    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION NE (30)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 4.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 700 AM  
LOWEST 84 1200 AM  
AVERAGE 89  
   
......................................................
 
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 69 1958  
MINIMUM TEMPERATURE (F) 45 30 1972  
1945  
 
 
SUNRISE AND SUNSET  
DECEMBER 13 2019......SUNRISE 716 AM PST SUNSET 452 PM PST  
DECEMBER 14 2019......SUNRISE 716 AM PST SUNSET 452 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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