418  
CDUS46 KSGX 180926  
CLIRAL  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
226 AM PDT THU SEP 18 2025  
   
...............................
 
 
...THE RIVERSIDE MUNI AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 17 2025...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1893 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 98 12:29 PM 112 1922 91 7 78  
MINIMUM 70 5:23 AM 43 1893 62 8 55  
1908  
AVERAGE 84 76 8 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.27 1963 0.01 -0.01 0.00  
MONTH TO DATE 0.00 0.06 -0.06 T  
SINCE JUL 1 T 0.20 -0.20 T  
SINCE OCT 1 4.34 9.32 -4.98 12.30  
SINCE JAN 1 4.29 6.91 -2.62 11.26  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE SEP 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 19 12 7 2  
MONTH TO DATE 248 223 25 286  
SINCE SEP 1 248 223 25 286  
SINCE JAN 1 1629 1539 90 1686    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 66 7:00 PM  
LOWEST 27 1:00 PM  
AVERAGE 47  
   
......................................................
 
 
THE RIVERSIDE MUNI AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 91 108 1917  
MINIMUM TEMPERATURE (F) 62 42 1933  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 6:35 AM PDT SUNSET 6:52 PM PDT  
SEPTEMBER 19 2025.....SUNRISE 6:36 AM PDT SUNSET 6:50 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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