Records for Boise Area, Idaho (BOIthr) on 09-01
  Record Highs
  
    - 
      1:  102°F (1945)
    
- 
      2:  101°F (1987)
    
- 
      3:  100°F (1976)
    
 
  Record Lows
  
    - 
      1:  39°F (1892)
    
- 
      2:  40°F (1889)
    
- 
      3:  41°F (1977)
    
 
  Lowest Highs
  
    - 
      1:  70°F (1893)
    
- 
      2:  67°F (1916)
    
- 
      3:  66°F (2009)
    
 
  Highest Lows
  
    - 
      1:  54°F (1964)
    
- 
      2:  67°F (1898)
    
- 
      3:  67°F (1881)
    
 
  Highest September temperature:
  
  104°F on 09-07-2022.
  Lowest September temperature:
  
  23°F on 09-14-1970.
  Average temperature is 71.2°F
  Average high is 85.6°F
  Average low is 56.8°F
 
  Temperature data from 1875 to 2022.
  Record Precipitation
  
    - 
      1:  0.65" (1964)
    
- 
      2:  0.24" (1915)
    
- 
      3:  0.20" (1961)
    
 
  Precipitation data from 1878 to 2022.