Weather Service Report


338 
CDUS46 KMTR 210045
CLISFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
445 PM PST SAT DEC 20 2014


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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 20 2014...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1927 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 TODAY                                                               
  MAXIMUM         62    359 PM  69    1999  56      6       60       
                                      1887                          
  MINIMUM         56    743 AM  31    1965  44     12       40       
  AVERAGE         59                        50      9       50      
                                                                     
PRECIPITATION (IN)                                                   
  TODAY            0.02          0.91 1970   0.15  -0.13     0.00    
  MONTH TO DATE   10.60                      2.44   8.16     0.35    
  SINCE JUL 1     13.32                      5.98   7.34     1.49    
  SINCE JAN 1     20.63                     19.06   1.57     3.38    
                                                                     
SNOWFALL (IN)                                                        
  TODAY            0.0           0.0                                 
  MONTH TO DATE    0.0                                               
  SINCE DEC 1      0.0                                               
  SINCE JUL 1      0.0                                               
  SNOW DEPTH      MM                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  TODAY            6                        15     -9       15       
  MONTH TO DATE  122                       280   -158      328       
  SINCE DEC 1    122                       280   -158      328       
  SINCE JUL 1    310                       844   -534      829       
                                                                     
 COOLING                                                             
  TODAY            0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1    497                       164    333      164       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   1   RESULTANT WIND DIRECTION  NE (60)       
  HIGHEST WIND SPEED     8   HIGHEST WIND DIRECTION     S (190)      
  HIGHEST GUST SPEED     9   HIGHEST GUST DIRECTION    SW (210)      
  AVERAGE WIND SPEED     1.6                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.9                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED TODAY.                            
  LIGHT RAIN                                                         
  FOG                                                                

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100          1200 AM                                     
 LOWEST     84           300 PM                                     
 AVERAGE    92                                                       

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

                                                                     
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        68      1999                    
 MINIMUM TEMPERATURE (F)   44        28      1990                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 20 2014......SUNRISE   720 AM PST   SUNSET   454 PM PST   
DECEMBER 21 2014......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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Western Regional Climate Center, wrcc@dri.edu