527  
CDUS46 KMTR 180825  
CLISTS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
125 AM PDT THU SEP 18 2025  
   
...............................  
 
   
..THE SANTA ROSA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 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 97 2:18 PM 98 2000 83 14 73  
MINIMUM 50 6:23 AM 44 2008 50 0 54  
2018  
AVERAGE 74 66 8 64  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.03 2022 0.01 -0.01 0.00  
MONTH TO DATE 0.12 0.04 0.08 0.00  
SINCE OCT 1 41.24 33.69 7.55 37.05  
SINCE JAN 1 15.65 21.70 -6.05 25.49  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1  
MONTH TO DATE 0 6  
SINCE SEP 1 0 6  
SINCE JUL 1 17 15  
 
COOLING  
YESTERDAY 9 0  
MONTH TO DATE 66 51  
SINCE SEP 1 66 51  
SINCE JAN 1 345 555    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION S (180)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 3.2  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 5:00 AM  
LOWEST 17 3:00 PM  
AVERAGE 57  
   
......................................................  
 
THE SANTA ROSA AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 83 101 2000  
MINIMUM TEMPERATURE (F) 49 41 2008  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 6:56 AM PDT SUNSET 7:14 PM PDT  
SEPTEMBER 19 2025.....SUNRISE 6:57 AM PDT SUNSET 7:12 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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