AFOS product CLIAPC
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CDUS46 KMTR 240829
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1228 AM PST SAT DEC 24 2016


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 23 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2016


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         55    255 PM  66    2004  55      0       56       
  MINIMUM         39   1141 PM  20    2011  36      3       36       
  AVERAGE         47                        45      2       46      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.66                                      0.00    
  MONTH TO DATE    4.20                                      2.66    
  SINCE OCT 1      8.95                                      4.07    
  SINCE JAN 1     23.62                                      8.17    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       18                                        19       
  MONTH TO DATE  382                                       376       
  SINCE DEC 1    382                                       376       
  SINCE JUL 1    886                                       917       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    186                                       378       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   4   RESULTANT WIND DIRECTION   W (270)      
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     W (270)      
  HIGHEST GUST SPEED    27   HIGHEST GUST DIRECTION     W (270)      
  AVERAGE WIND SPEED     8.2                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.7                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93           800 AM                                     
 LOWEST     71           400 PM                                     
 AVERAGE    82                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   55        65      2013                    
 MINIMUM TEMPERATURE (F)   36        19      1998                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 24 2016......SUNRISE   724 AM PST   SUNSET   454 PM PST   
DECEMBER 25 2016......SUNRISE   724 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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