AFOS product CLISFO
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CDUS46 KMTR 220858
CLISFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1258 AM PST THU DEC 22 2016


................................... 

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 21 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1927 TO 2016


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         62    251 PM  68    1999  56      6       59       
  MINIMUM         45    419 AM  28    1990  44      1       51       
  AVERAGE         54                        50      4       55      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          1.73 1945   0.15  -0.15     0.92    
  MONTH TO DATE    3.98                      2.59   1.39     2.98    
  SINCE OCT 1      8.30                      5.92   2.38     4.40    
  SINCE JAN 1     20.74                     19.21   1.53     8.05    
                                                                     
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       11                        15     -4       10       
  MONTH TO DATE  273                       295    -22      262       
  SINCE DEC 1    273                       295    -22      262       
  SINCE JUL 1    687                       859   -172      619       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1    142                       164    -22      327       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   2   RESULTANT WIND DIRECTION   E (80)       
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    NE (30)       
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION    NE (30)       
  AVERAGE WIND SPEED     3.0                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.4                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    83          1000 PM                                     
 LOWEST     36           200 PM                                     
 AVERAGE    60                                                       

..........................................................

                                                                     
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        68      1999                    
 MINIMUM TEMPERATURE (F)   44        27      1990                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 22 2016......SUNRISE   722 AM PST   SUNSET   455 PM PST   
DECEMBER 23 2016......SUNRISE   722 AM PST   SUNSET   456 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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