AFOS product CLISFO
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CDUS46 KMTR 200845
CLISFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1245 AM PST TUE DEC 20 2016


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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 19 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         55    243 PM  68    1999  56     -1       55       
  MINIMUM         36    440 AM  32    1965  44     -8       49       
  AVERAGE         46                        50     -4       52      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          1.81 1952   0.14  -0.14     0.04    
  MONTH TO DATE    3.98                      2.29   1.69     1.82    
  SINCE OCT 1      8.30                      5.62   2.68     3.24    
  SINCE JAN 1     20.74                     18.91   1.83     6.89    
                                                                     
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       19                        15      4       13       
  MONTH TO DATE  245                       265    -20      235       
  SINCE DEC 1    245                       265    -20      235       
  SINCE JUL 1    659                       829   -170      592       
                                                                     
 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  NE (60)       
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION    NE (30)       
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION     N (340)      
  AVERAGE WIND SPEED     5.5                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.2                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    85           500 AM                                     
 LOWEST     41           200 PM                                     
 AVERAGE    63                                                       

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

                                                                     
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        69      1999                    
                                             1887                    
 MINIMUM TEMPERATURE (F)   44        31      1965                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 20 2016......SUNRISE   721 AM PST   SUNSET   454 PM PST   
DECEMBER 21 2016......SUNRISE   721 AM PST   SUNSET   455 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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