656  
CDUS46 KMTR 180837  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
137 AM PDT FRI APR 18 2025  
   
...............................  
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR APRIL 17 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 64 2:01 PM 82 2021 68 -4 76  
MINIMUM 51 5:49 AM 32 2004 44 7 46  
2022  
AVERAGE 58 56 2 61  
 
PRECIPITATION (IN)  
YESTERDAY T 0.00  
MONTH TO DATE 0.23 0.96  
SINCE OCT 1 15.85 19.19  
SINCE JAN 1 7.87 13.15  
 
DEGREE DAYS  
HEATING  
YESTERDAY 7 4  
MONTH TO DATE 151 180  
SINCE MAR 1 552 551  
SINCE JUL 1 2407 2199  
 
COOLING  
YESTERDAY 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 W (250)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 7.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 2:00 AM  
LOWEST 65 3:00 PM  
AVERAGE 81  
   
......................................................  
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 86 2021  
MINIMUM TEMPERATURE (F) 44 33 2005  
 
SUNRISE AND SUNSET  
APRIL 18 2025.........SUNRISE 6:29 AM PDT SUNSET 7:49 PM PDT  
APRIL 19 2025.........SUNRISE 6:27 AM PDT SUNSET 7:50 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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