672  
CDUS46 KMTR 260830  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
130 AM PDT FRI SEP 26 2025  
   
...............................  
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 25 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 76 3:18 PM 99 2016 80 -4 75  
MINIMUM 56 11:00 PM 37 2005 50 6 56  
AVERAGE 66 65 1 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.09 0.00  
MONTH TO DATE 0.12 T  
SINCE OCT 1 16.20 19.88  
SINCE JAN 1 8.22 13.84  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0  
MONTH TO DATE 1 20  
SINCE SEP 1 1 20  
SINCE JUL 1 46 33  
 
COOLING  
YESTERDAY 1 1  
MONTH TO DATE 84 47  
SINCE SEP 1 84 47  
SINCE JAN 1 195 348    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SW (230)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 10.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 9:00 PM  
LOWEST 59 4:00 PM  
AVERAGE 76  
   
......................................................  
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 99 2009  
2016  
MINIMUM TEMPERATURE (F) 50 43 2013  
2018  
 
SUNRISE AND SUNSET  
SEPTEMBER 26 2025.....SUNRISE 7:01 AM PDT SUNSET 6:59 PM PDT  
SEPTEMBER 27 2025.....SUNRISE 7:02 AM PDT SUNSET 6:58 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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