AFOS product CLIAPC
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CDUS46 KMTR 310826
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1226 AM PST TUE DEC 31 2019


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 30 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2019


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         58    328 PM  63    2017  54      4       58       
                                      2013                          
  MINIMUM         35   1153 PM  26    2015  36     -1       30       
  AVERAGE         47                        45      2       44      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00                                      0.00    
  MONTH TO DATE    4.93                                      1.94    
  SINCE OCT 1      5.74                                      3.20    
  SINCE JAN 1     28.40                                     15.97    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       18                                        21       
  MONTH TO DATE  456                                       467       
  SINCE DEC 1    456                                       467       
  SINCE JUL 1   1056                                      1034       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    346                                       182       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   1   RESULTANT WIND DIRECTION  SE (140)      
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION    NE (40)       
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    NE (30)       
  AVERAGE WIND SPEED     3.4                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.1                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  FOG                                                                

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100           700 AM                                     
 LOWEST     67           300 PM                                     
 AVERAGE    84                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   54        62      2011                    
 MINIMUM TEMPERATURE (F)   36        24      2015                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 31 2019......SUNRISE   726 AM PST   SUNSET   459 PM PST   
JANUARY  1 2020.......SUNRISE   726 AM PST   SUNSET   500 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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