875  
CDUS46 KMTR 010838  
CLISTS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
138 AM PDT WED OCT 01 2025  
   
...............................  
 
   
..THE SANTA ROSA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 30 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 69 12:03 PM 99 2001 81 -12 96  
MINIMUM 59 6:24 AM 37 2019 48 11 46  
AVERAGE 64 65 -1 71  
 
PRECIPITATION (IN)  
YESTERDAY 0.04R T 2011 0.01 0.03 0.00  
2020  
MONTH TO DATE 0.37 0.13 0.24 0.00  
SINCE OCT 1 41.49 33.78 7.71 37.05  
SINCE JAN 1 15.90 21.79 -5.89 25.49  
 
DEGREE DAYS  
HEATING  
YESTERDAY 1 0  
MONTH TO DATE 3 11  
SINCE SEP 1 3 11  
SINCE JUL 1 20 20  
 
COOLING  
YESTERDAY 0 6  
MONTH TO DATE 113 94  
SINCE SEP 1 113 94  
SINCE JAN 1 392 598    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 4.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 12:00 AM  
LOWEST 73 1:00 PM  
AVERAGE 87  
   
......................................................  
 
THE SANTA ROSA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 106 2024  
MINIMUM TEMPERATURE (F) 48 37 2019  
 
SUNRISE AND SUNSET  
OCTOBER 1 2025.......SUNRISE 7:07 AM PDT SUNSET 6:53 PM PDT  
OCTOBER 2 2025.......SUNRISE 7:08 AM PDT SUNSET 6:52 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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