Records for Ontario Area, Oregon (ONOthr) on 05-20
  Record Highs
  
    - 
      1:  93°F (1980)
    
 
    - 
      2:  93°F (1958)
    
 
    - 
      3:  92°F (1963)
    
 
  
 
  Record Lows
  
    - 
      1:  35°F (2003)
    
 
    - 
      2:  35°F (1976)
    
 
    - 
      3:  35°F (1971)
    
 
  
 
  Lowest Highs
  
    - 
      1:  58°F (1954)
    
 
    - 
      2:  57°F (2006)
    
 
    - 
      3:  57°F (1993)
    
 
  
 
  Highest Lows
  
    - 
      1:  54°F (1962)
    
 
    - 
      2:  56°F (2020)
    
 
    - 
      3:  57°F (2016)
    
 
  
 
  Highest May temperature:
  
  103°F on 05-29-1986.
  Lowest May temperature:
  
  25°F on 05-01-1946.
  Average temperature is 61.6°F
  Average high is 75.1°F
  Average low is 48.1°F
 
  Temperature data from 1945 to 2022.
  Record Precipitation
  
    - 
      1:  0.65" (2019)
    
 
    - 
      2:  0.62" (2020)
    
 
    - 
      3:  0.30" (1981)
    
 
  
 
  Precipitation data from 1945 to 2022.