Records for Hillsboro Area, Oregon (HIOthr) on 08-31
  Record Highs
  
    - 
      1:  100°F (1998)
    
- 
      2:  98°F (1987)
    
- 
      3:  94°F (1950)
    
 
  Record Lows
  
    - 
      1:  34°F (1930)
    
- 
      2:  38°F (2008)
    
- 
      3:  38°F (1964)
    
 
  Lowest Highs
  
    - 
      1:  62°F (1974)
    
- 
      2:  61°F (1961)
    
- 
      3:  60°F (2022)
    
 
  Highest Lows
  
    - 
      1:  62°F (1937)
    
- 
      2:  63°F (1980)
    
- 
      3:  64°F (2010)
    
 
  Highest August temperature:
  
  106°F on 08-17-1977.
  Lowest August temperature:
  
  30°F on 08-30-1930.
  Average temperature is 65.2°F
  Average high is 80.4°F
  Average low is 50.1°F
 
  Temperature data from 1929 to 2022.
  Record Precipitation
  
    - 
      1:  0.68" (1939)
    
- 
      2:  0.39" (1991)
    
- 
      3:  0.33" (1961)
    
 
  Precipitation data from 1929 to 2022.