AFOS product CLIAPC
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CDUS46 KMTR 010852
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
152 AM PDT SAT SEP 1 2018


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR AUGUST 31 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         80    445 PM  97    2017  81     -1       97       
  MINIMUM         50    543 AM  42    2008  52     -2       48       
  AVERAGE         65                        66     -1       73      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00                                      0.00    
  MONTH TO DATE    0.00                                       T      
  SINCE OCT 1     15.80                                     37.11    
  SINCE JAN 1     12.77                                     28.16    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE   24                                         2       
  SINCE JUN 1     99                                        27       
  SINCE JUL 1     41                                        10       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         8       
  MONTH TO DATE   41                                       114       
  SINCE JUN 1    147                                       348       
  SINCE JAN 1    152                                       382       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   6   RESULTANT WIND DIRECTION  SW (220)      
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     S (200)      
  HIGHEST GUST SPEED    25   HIGHEST GUST DIRECTION     E (110)      
  AVERAGE WIND SPEED     7.5                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.3                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  FOG                                                                
  FOG W/VISIBILITY <= 1/4 MILE                                       

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100           400 AM                                     
 LOWEST     42           500 PM                                     
 AVERAGE    71                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   81       106      2017                    
 MINIMUM TEMPERATURE (F)   52        45      1999                    

                                                                     
SUNRISE AND SUNSET                                                   
SEPTEMBER  1 2018.....SUNRISE   639 AM PDT   SUNSET   739 PM PDT   
SEPTEMBER  2 2018.....SUNRISE   640 AM PDT   SUNSET   737 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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