Weather Service Report


762 
CDUS46 KMTR 210828
CLISFO

CLIMATE REPORT 
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
128 AM PDT MON SEP 21 2020

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 2020...

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1927 TO 2020


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         83  12:58 PM  93    1983  74      9       83        
                                      1990                           
                                      2015                           
  MINIMUM         58   6:10 AM  48    1947  56      2       58        
                                      1954                           
                                      1965                           
  AVERAGE         71                        65      6       71     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          0.08 2005   0.00   0.00     0.00     
  MONTH TO DATE    0.00                      0.08  -0.08     0.04     
  SINCE OCT 1      9.17                     20.56 -11.39    23.35     
  SINCE JAN 1      4.16                     13.20  -9.04    18.47     

SNOWFALL (IN)                                                              
  YESTERDAY       MM             0.0                                  
  MONTH TO DATE   MM                                                  
  SINCE SEP 1     MM                                                  
  SINCE JUL 1     MM                                                  

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY        0                         2     -2        0        
  MONTH TO DATE   14                        40    -26        0        
  SINCE SEP 1     14                        40    -26        0        
  SINCE JUL 1     78                       153    -75       29        

 COOLING                                                              
  YESTERDAY        6                         1      5        6        
  MONTH TO DATE   76                        35     41       64        
  SINCE SEP 1     76                        35     41       64        
  SINCE JAN 1    241                       132    109      281        
...................................................................


WIND (MPH)                                                            
  RESULTANT WIND SPEED   8   RESULTANT WIND DIRECTION  NW (310)       
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION    NW (310)       
  HIGHEST GUST SPEED    25   HIGHEST GUST DIRECTION    NW (310)       
  AVERAGE WIND SPEED     9.7                                        


SKY COVER                                                             
  POSSIBLE SUNSHINE  MM                                                 
  AVERAGE SKY COVER 0.2                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  FOG                                                                 
  HAZE                                                                


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    90          11:00 PM                                      
 LOWEST     42           3:00 PM                                      
 AVERAGE    66                                                        

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


THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   74        95      2003                      
 MINIMUM TEMPERATURE (F)   56        45      1955                      


SUNRISE AND SUNSET                                                    
SEPTEMBER 21 2020.....SUNRISE   6:57 AM PDT   SUNSET   7:07 PM PDT     
SEPTEMBER 22 2020.....SUNRISE   6:58 AM PDT   SUNSET   7:05 PM PDT     


-  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