Records for Rapid City Area, South Dakota (RAPthr) on 05-09
  Record Highs
  
    - 
      1:  86°F (1962)
    
- 
      2:  84°F (1944)
    
- 
      3:  83°F (1987)
    
 
  Record Lows
  
    - 
      1:  25°F (2002)
    
- 
      2:  27°F (2020)
    
- 
      3:  27°F (2014)
    
 
  Lowest Highs
  
    - 
      1:  62°F (1985)
    
- 
      2:  56°F (1991)
    
- 
      3:  53°F (2011)
    
 
  Highest Lows
  
    - 
      1:  36°F (1979)
    
- 
      2:  37°F (1948)
    
- 
      3:  42°F (1945)
    
 
  Highest May temperature:
  
  98°F on 05-27-1969.
  Lowest May temperature:
  
  18°F on 05-01-1950.
  Average temperature is 52.4°F
  Average high is 62.7°F
  Average low is 42.1°F
 
  Temperature data from 1942 to 2022.
  Record Precipitation
  
    - 
      1:  1.17" (2015)
    
- 
      2:  0.80" (1992)
    
- 
      3:  0.60" (2008)
    
 
  Precipitation data from 1942 to 2022.