898  
CDUS46 KMTR 260839  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
139 AM PDT SAT JUL 26 2025  
   
...............................  
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR JULY 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 73 4:57 PM 98 2014 78 -5 85  
MINIMUM 55 12:08 AM 47 2008 55 0 58  
AVERAGE 64 67 -3 72  
 
PRECIPITATION (IN)  
YESTERDAY T 0.00  
MONTH TO DATE T 0.00  
SINCE OCT 1 16.08 19.88  
SINCE JAN 1 8.10 13.84  
 
DEGREE DAYS  
HEATING  
YESTERDAY 1 0  
MONTH TO DATE 34 0  
SINCE JUN 1 98 37  
SINCE JUL 1 34 0  
 
COOLING  
YESTERDAY 0 7  
MONTH TO DATE 9 151  
SINCE JUN 1 17 207  
SINCE JAN 1 34 217    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 14.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 3:00 AM  
LOWEST 55 3:00 PM  
AVERAGE 76  
   
......................................................  
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 93 2008  
MINIMUM TEMPERATURE (F) 55 48 2016  
 
SUNRISE AND SUNSET  
JULY 26 2025..........SUNRISE 6:07 AM PDT SUNSET 8:24 PM PDT  
JULY 27 2025..........SUNRISE 6:08 AM PDT SUNSET 8:23 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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