073  
CDUS46 KMTR 020041  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
541 PM PDT THU MAY 01 2025  
   
...............................  
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR MAY 1 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 66 1:18 PM 91 2017 71 -5 78  
MINIMUM 48 3:38 AM 34 2008 46 2 39  
2011  
AVERAGE 57 58 -1 59  
 
PRECIPITATION (IN)  
TODAY 0.00 0.00  
MONTH TO DATE 0.00 0.00  
SINCE OCT 1 15.85 19.19  
SINCE JAN 1 7.87 13.15  
 
DEGREE DAYS  
HEATING  
TODAY 8 6  
MONTH TO DATE 8 6  
SINCE MAR 1 584 637  
SINCE JUL 1 2439 2285  
 
COOLING  
TODAY 0 0  
MONTH TO DATE 0 0  
SINCE MAR 1 2 0  
SINCE JAN 1 2 0    
...............................................................  
 
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 S (200)  
AVERAGE WIND SPEED 9.2  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 5:00 AM  
LOWEST 68 1:00 PM  
AVERAGE 81  
   
......................................................  
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 93 2017  
MINIMUM TEMPERATURE (F) 46 37 2002  
2012  
 
SUNRISE AND SUNSET  
MAY 1 2025...........SUNRISE 6:12 AM PDT SUNSET 8:01 PM PDT  
MAY 2 2025...........SUNRISE 6:11 AM PDT SUNSET 8:02 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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