004  
CDUS46 KMTR 211218  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
518 AM PDT TUE MAY 21 2024  
   
...............................  
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR MAY 20 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 72 2:09 PM 91 2013 74 -2 70  
MINIMUM 44 4:54 AM 38 2021 49 -5 52  
AVERAGE 58 61 -3 61  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.00  
MONTH TO DATE 0.69 0.70  
SINCE OCT 1 19.88 29.49  
SINCE JAN 1 13.84 21.07  
 
DEGREE DAYS  
HEATING  
YESTERDAY 7 4  
MONTH TO DATE 120 122  
SINCE MAR 1 751 806  
SINCE JUL 1 2399 2836  
 
COOLING  
YESTERDAY 0 0  
MONTH TO DATE 5 6  
SINCE MAR 1 5 9  
SINCE JAN 1 5 9    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 7.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 4:00 AM  
LOWEST 47 1:00 PM  
AVERAGE 70  
   
......................................................  
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 96 2000  
MINIMUM TEMPERATURE (F) 49 37 2021  
 
SUNRISE AND SUNSET  
MAY 21 2024...........SUNRISE 5:53 AM PDT SUNSET 8:19 PM PDT  
MAY 22 2024...........SUNRISE 5:52 AM PDT SUNSET 8:20 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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