074  
CDUS46 KMTR 110035  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
535 PM PDT SUN AUG 10 2025  
   
...............................  
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR AUGUST 10 2025  
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 77 3:26 PM 93 2002 79 -2 77  
MINIMUM 55 6:40 AM 47 2003 55 0 54  
AVERAGE 66 67 -1 66  
 
PRECIPITATION (IN)  
TODAY 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  
TODAY 0 0  
MONTH TO DATE 5 3  
SINCE JUN 1 107 45  
SINCE JUL 1 43 8  
 
COOLING  
TODAY 1 1  
MONTH TO DATE 23 27  
SINCE JUN 1 43 241  
SINCE JAN 1 60 251    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SW (220)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 8.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 3:00 AM  
LOWEST 55 1:00 PM  
AVERAGE 76  
   
......................................................  
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 92 1998  
MINIMUM TEMPERATURE (F) 55 45 2005  
 
SUNRISE AND SUNSET  
AUGUST 10 2025........SUNRISE 6:20 AM PDT SUNSET 8:08 PM PDT  
AUGUST 11 2025........SUNRISE 6:21 AM PDT SUNSET 8:07 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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