Records for Riverside Area, California (RALthr) on 09-30
  Record Highs
  
    - 
      1:  108°F (2020)
    
 
    - 
      2:  108°F (1980)
    
 
    - 
      3:  106°F (2001)
    
 
  
 
  Record Lows
  
    - 
      1:  42°F (1948)
    
 
    - 
      2:  42°F (1915)
    
 
    - 
      3:  43°F (1940)
    
 
  
 
  Lowest Highs
  
    - 
      1:  68°F (2010)
    
 
    - 
      2:  68°F (1997)
    
 
    - 
      3:  67°F (2016)
    
 
  
 
  Highest Lows
  
    - 
      1:  67°F (1983)
    
 
    - 
      2:  67°F (1903)
    
 
    - 
      3:  67°F (1894)
    
 
  
 
  Highest September temperature:
  
  117°F on 09-05-2020.
  Lowest September temperature:
  
  37°F on 09-15-1902.
  Average temperature is 72.8°F
  Average high is 87.4°F
  Average low is 58.3°F
 
  Temperature data from 1893 to 2022.
  Record Precipitation
  
    - 
      1:  1.72" (1921)
    
 
    - 
      2:  0.86" (1916)
    
 
    - 
      3:  0.64" (1983)
    
 
  
 
  Precipitation data from 1893 to 2022.