Records for Williston Area, North Dakota (ISNthr) on 05-15
  Record Highs
  
    - 
      1:  96°F (1936)
    
- 
      2:  90°F (1987)
    
- 
      3:  90°F (1934)
    
 
  Record Lows
  
    - 
      1:  25°F (1945)
    
- 
      2:  26°F (2014)
    
- 
      3:  26°F (1921)
    
 
  Lowest Highs
  
    - 
      1:  59°F (1936)
    
- 
      2:  58°F (1931)
    
- 
      3:  56°F (1984)
    
 
  Highest Lows
  
    - 
      1:  42°F (1899)
    
- 
      2:  45°F (1983)
    
- 
      3:  46°F (1942)
    
 
  Highest May temperature:
  
  106°F on 05-22-1980.
  Lowest May temperature:
  
  10°F on 05-03-2005.
  Average temperature is 53.5°F
  Average high is 67.2°F
  Average low is 39.8°F
 
  Temperature data from 1894 to 2022.
  Record Precipitation
  
    - 
      1:  0.78" (1966)
    
- 
      2:  0.68" (1915)
    
- 
      3:  0.52" (2017)
    
 
  Precipitation data from 1894 to 2022.