Records for Lewiston Area, Idaho (LWSthr) on 05-21
  Record Highs
  
    - 
      1:  97°F (1928)
    
 
    - 
      2:  95°F (1942)
    
 
    - 
      3:  93°F (1929)
    
 
  
 
  Record Lows
  
    - 
      1:  35°F (2010)
    
 
    - 
      2:  35°F (1971)
    
 
    - 
      3:  35°F (1960)
    
 
  
 
  Lowest Highs
  
    - 
      1:  60°F (2018)
    
 
    - 
      2:  60°F (1958)
    
 
    - 
      3:  58°F (2000)
    
 
  
 
  Highest Lows
  
    - 
      1:  51°F (1986)
    
 
    - 
      2:  55°F (2007)
    
 
    - 
      3:  55°F (1960)
    
 
  
 
  Highest May temperature:
  
  104°F on 05-28-1934.
  Lowest May temperature:
  
  23°F on 05-01-1954.
  Average temperature is 61.5°F
  Average high is 73.6°F
  Average low is 49.5°F
 
  Temperature data from 1881 to 2022.
  Record Precipitation
  
    - 
      1:  0.85" (1932)
    
 
    - 
      2:  0.73" (1921)
    
 
    - 
      3:  0.65" (1998)
    
 
  
 
  Precipitation data from 1881 to 2022.