CDUS46 KMTR 190831

CLIAPC



CLIMATE REPORT 

NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA

131 AM PDT TUE AUG 19 2025



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



...THE NAPA AIRPORT  CLIMATE SUMMARY FOR AUGUST 18 2025...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1998 TO 2025





WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      

                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     

                                                  NORMAL           

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

TEMPERATURE (F)                                                          

 YESTERDAY                                                           

  MAXIMUM         82   4:09 PM  94    2020  80      2       82        

  MINIMUM         49   6:24 AM  46    2007  54     -5       55        

  AVERAGE         66                        67     -1       69     



PRECIPITATION (IN)                                                    

  YESTERDAY        0.00                                      0.00     

  MONTH TO DATE    0.00                                      0.00     

  SINCE OCT 1     16.08                                     19.88     

  SINCE JAN 1      8.10                                     13.84     



DEGREE DAYS                                                           

 HEATING                                                              

  YESTERDAY        0                                         0        

  MONTH TO DATE    5                                         6        

  SINCE JUN 1    107                                        48        

  SINCE JUL 1     43                                        11        



 COOLING                                                              

  YESTERDAY        1                                         4        

  MONTH TO DATE   37                                        44        

  SINCE JUN 1     57                                       258        

  SINCE JAN 1     74                                       268        

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





WIND (MPH)                                                            

  RESULTANT WIND SPEED   6   RESULTANT WIND DIRECTION  SW (230)       

  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     S (200)       

  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION    SW (230)       

  AVERAGE WIND SPEED     6.5                                        





SKY COVER                                                             

  POSSIBLE SUNSHINE  MM                                                 

  AVERAGE SKY COVER 0.0                                                 





WEATHER CONDITIONS                                                    

THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         

  NO SIGNIFICANT WEATHER WAS OBSERVED.                                  





RELATIVE HUMIDITY (PERCENT)

 HIGHEST    97           5:00 AM                                      

 LOWEST     33           4:00 PM                                      

 AVERAGE    65                                                        



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





THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY

                         NORMAL    RECORD    YEAR                     

 MAXIMUM TEMPERATURE (F)   80        84      2013                      

                                             2024                     

 MINIMUM TEMPERATURE (F)   54        48      1999                      





SUNRISE AND SUNSET                                                    

AUGUST 19 2025........SUNRISE   6:28 AM PDT   SUNSET   7:57 PM PDT     

AUGUST 20 2025........SUNRISE   6:29 AM PDT   SUNSET   7:55 PM PDT     





-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SETOR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.









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