AFOS product CLIAPC
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081 
CDUS46 KMTR 170840
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1239 AM PST MON DEC 17 2018


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 16 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         62   1233 PM  69    2011  55      7       65       
  MINIMUM         48    158 AM  28    2015  36     12       30       
                                      2006                          
  AVERAGE         55                        46      9       48      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.57                                      0.00    
  MONTH TO DATE    1.35                                      0.01    
  SINCE OCT 1      2.61                                      2.98    
  SINCE JAN 1     15.38                                     31.16    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       10                                        17       
  MONTH TO DATE  241                                       265       
  SINCE DEC 1    241                                       265       
  SINCE JUL 1    808                                       793       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    182                                       530       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION  SE (130)      
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     W (270)      
  HIGHEST GUST SPEED    25   HIGHEST GUST DIRECTION    SW (240)      
  AVERAGE WIND SPEED     4.8                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 1.0                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100           300 AM                                     
 LOWEST     69          1100 AM                                     
 AVERAGE    85                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   55        66      2017                    
                                             2000                    
 MINIMUM TEMPERATURE (F)   36        24      2008                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 17 2018......SUNRISE   720 AM PST   SUNSET   451 PM PST   
DECEMBER 18 2018......SUNRISE   720 AM PST   SUNSET   451 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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