Records for Dubuque Area, Iowa (DBQthr) on 09-30
  Record Highs
  
    - 
      1:  89°F (1897)
    
 
    - 
      2:  87°F (1971)
    
 
    - 
      3:  86°F (2019)
    
 
  
 
  Record Lows
  
    - 
      1:  24°F (1899)
    
 
    - 
      2:  30°F (2003)
    
 
    - 
      3:  30°F (1972)
    
 
  
 
  Lowest Highs
  
    - 
      1:  68°F (1878)
    
 
    - 
      2:  67°F (1879)
    
 
    - 
      3:  66°F (2002)
    
 
  
 
  Highest Lows
  
    - 
      1:  47°F (1876)
    
 
    - 
      2:  48°F (1985)
    
 
    - 
      3:  48°F (1945)
    
 
  
 
  Highest September temperature:
  
  99°F on 09-06-1922.
  Lowest September temperature:
  
  24°F on 09-30-1899.
  Average temperature is 58.7°F
  Average high is 69.3°F
  Average low is 48.2°F
 
  Temperature data from 1874 to 2022.
  Record Precipitation
  
    - 
      1:  2.64" (1961)
    
 
    - 
      2:  2.27" (1881)
    
 
    - 
      3:  1.45" (1911)
    
 
  
 
  Precipitation data from 1873 to 2022.