773  
CDUS46 KMTR 110833  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
133 AM PDT WED SEP 11 2024  
   
...............................
 
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 10 2024
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 73 2:34 PM 96 2017 81 -8 80  
MINIMUM 52 11:30 PM 40 2005 52 0 50  
AVERAGE 63 66 -3 65  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.00  
MONTH TO DATE 0.00 0.01  
SINCE OCT 1 19.88 29.52  
SINCE JAN 1 13.84 21.10  
 
DEGREE DAYS  
HEATING  
YESTERDAY 2 0  
MONTH TO DATE 2 0  
SINCE SEP 1 2 0  
SINCE JUL 1 15 8  
 
COOLING  
YESTERDAY 0 0  
MONTH TO DATE 31 23  
SINCE SEP 1 31 23  
SINCE JAN 1 332 296    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 10.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 2:00 AM  
LOWEST 57 4:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 98 2017  
MINIMUM TEMPERATURE (F) 52 40 2005  
 
SUNRISE AND SUNSET  
SEPTEMBER 11 2024.....SUNRISE 6:48 AM PDT SUNSET 7:22 PM PDT  
SEPTEMBER 12 2024.....SUNRISE 6:49 AM PDT SUNSET 7:21 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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