Records for Sioux City Area, Iowa (SUXthr) on 05-18
  Record Highs
  
    - 
      1:  99°F (1934)
    
- 
      2:  96°F (1970)
    
- 
      3:  95°F (1996)
    
 
  Record Lows
  
    - 
      1:  33°F (1915)
    
- 
      2:  34°F (2002)
    
- 
      3:  34°F (1916)
    
 
  Lowest Highs
  
    - 
      1:  70°F (1911)
    
- 
      2:  69°F (1934)
    
- 
      3:  68°F (1964)
    
 
  Highest Lows
  
    - 
      1:  45°F (1930)
    
- 
      2:  51°F (1957)
    
- 
      3:  52°F (1968)
    
 
  Highest May temperature:
  
  106°F on 05-14-2013.
  Lowest May temperature:
  
  23°F on 05-01-1909.
  Average temperature is 60.4°F
  Average high is 72.4°F
  Average low is 48.4°F
 
  Temperature data from 1889 to 2022.
  Record Precipitation
  
    - 
      1:  1.35" (1962)
    
- 
      2:  1.19" (1990)
    
- 
      3:  0.78" (1919)
    
 
  Precipitation data from 1889 to 2022.