Records for Riverside Area, California (RALthr) on 05-31
  Record Highs
  
    - 
      1:  103°F (1910)
    
 
    - 
      2:  103°F (1909)
    
 
    - 
      3:  102°F (1912)
    
 
  
 
  Record Lows
  
    - 
      1:  42°F (1961)
    
 
    - 
      2:  42°F (1911)
    
 
    - 
      3:  43°F (1927)
    
 
  
 
  Lowest Highs
  
    - 
      1:  63°F (1997)
    
 
    - 
      2:  62°F (2000)
    
 
    - 
      3:  62°F (1981)
    
 
  
 
  Highest Lows
  
    - 
      1:  61°F (1948)
    
 
    - 
      2:  62°F (1967)
    
 
    - 
      3:  67°F (1935)
    
 
  
 
  Highest May temperature:
  
  110°F on 05-29-1984.
  Lowest May temperature:
  
  33°F on 05-01-1915.
  Average temperature is 69.9°F
  Average high is 83.3°F
  Average low is 56.5°F
 
  Temperature data from 1893 to 2022.
  Record Precipitation
  
    - 
      1:  0.15" (1936)
    
 
    - 
      2:  0.12" (1948)
    
 
    - 
      3:  0.00" (1965)
    
 
  
 
  Precipitation data from 1893 to 2022.