Records for Chicago Area, Illinois (ORDthr) on 05-15
  Record Highs
  
    - 
      1:  91°F (1962)
    
 
    - 
      2:  89°F (1947)
    
 
    - 
      3:  89°F (1932)
    
 
  
 
  Record Lows
  
    - 
      1:  35°F (2016)
    
 
    - 
      2:  35°F (1895)
    
 
    - 
      3:  36°F (1873)
    
 
  
 
  Lowest Highs
  
    - 
      1:  71°F (1962)
    
 
    - 
      2:  67°F (1932)
    
 
    - 
      3:  64°F (1998)
    
 
  
 
  Highest Lows
  
    - 
      1:  45°F (1945)
    
 
    - 
      2:  45°F (1904)
    
 
    - 
      3:  45°F (1873)
    
 
  
 
  Highest May temperature:
  
  98°F on 05-31-1934.
  Lowest May temperature:
  
  27°F on 05-02-1875.
  Average temperature is 57.6°F
  Average high is 65.4°F
  Average low is 49.8°F
 
  Temperature data from 1872 to 2022.
  Record Precipitation
  
    - 
      1:  2.31" (1915)
    
 
    - 
      2:  1.27" (1923)
    
 
    - 
      3:  0.85" (1943)
    
 
  
 
  Precipitation data from 1871 to 2022.