AFOS product CLIAPC
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CDUS46 KMTR 050828
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1228 AM PST FRI JAN 5 2018


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR JANUARY 4 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         65    144 PM  67    2014  54     11       57       
                                      2012                          
  MINIMUM         52    206 AM  22    2009  36     16       47       
  AVERAGE         59                        45     14       52      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.02                                      0.43    
  MONTH TO DATE    0.18                                      1.77    
  SINCE OCT 1      3.21                                     10.72    
  SINCE JAN 1      0.18                                      1.77    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        6                                        13       
  MONTH TO DATE   48                                        64       
  SINCE DEC 1    596                                       609       
  SINCE JUL 1   1124                                      1113       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1      0                                         0       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   6   RESULTANT WIND DIRECTION   E (90)       
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     E (80)       
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION     E (90)       
  AVERAGE WIND SPEED     8.1                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.9                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  LIGHT RAIN                                                         
  FOG                                                                
  HAZE                                                               

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93           400 AM                                     
 LOWEST     72           200 PM                                     
 AVERAGE    83                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   54        70      2014                    
 MINIMUM TEMPERATURE (F)   37        24      2014                    

                                                                     
SUNRISE AND SUNSET                                                   
JANUARY  5 2018.......SUNRISE   726 AM PST   SUNSET   503 PM PST   
JANUARY  6 2018.......SUNRISE   726 AM PST   SUNSET   504 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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