Records for Helena Area, Montana (HLNthr) on 09-15
  Record Highs
  
    - 
      1:  94°F (2000)
    
 
    - 
      2:  92°F (2002)
    
 
    - 
      3:  89°F (1998)
    
 
  
 
  Record Lows
  
    - 
      1:  22°F (1970)
    
 
    - 
      2:  30°F (1969)
    
 
    - 
      3:  30°F (1965)
    
 
  
 
  Lowest Highs
  
    - 
      1:  56°F (1890)
    
 
    - 
      2:  54°F (1935)
    
 
    - 
      3:  54°F (1910)
    
 
  
 
  Highest Lows
  
    - 
      1:  40°F (2017)
    
 
    - 
      2:  43°F (1973)
    
 
    - 
      3:  44°F (1900)
    
 
  
 
  Highest September temperature:
  
  102°F on 09-07-2022.
  Lowest September temperature:
  
  6°F on 09-24-1926.
  Average temperature is 59.3°F
  Average high is 73.8°F
  Average low is 44.9°F
 
  Temperature data from 1880 to 2022.
  Record Precipitation
  
    - 
      1:  1.02" (2017)
    
 
    - 
      2:  0.80" (1987)
    
 
    - 
      3:  0.74" (1886)
    
 
  
 
  Precipitation data from 1880 to 2022.