Records for Hillsboro Area, Oregon (HIOthr) on 08-21
  Record Highs
  
    - 
      1:  99°F (1951)
    
- 
      2:  98°F (1961)
    
- 
      3:  98°F (1958)
    
 
  Record Lows
  
    - 
      1:  39°F (1947)
    
- 
      2:  39°F (1930)
    
- 
      3:  41°F (1980)
    
 
  Lowest Highs
  
    - 
      1:  60°F (1977)
    
- 
      2:  60°F (1958)
    
- 
      3:  59°F (2007)
    
 
  Highest Lows
  
    - 
      1:  67°F (1943)
    
- 
      2:  68°F (2001)
    
- 
      3:  68°F (1977)
    
 
  Highest August temperature:
  
  106°F on 08-17-1977.
  Lowest August temperature:
  
  30°F on 08-30-1930.
  Average temperature is 66.6°F
  Average high is 81.8°F
  Average low is 51.3°F
 
  Temperature data from 1929 to 2022.
  Record Precipitation
  
    - 
      1:  0.54" (1979)
    
- 
      2:  0.46" (1978)
    
- 
      3:  0.35" (2004)
    
 
  Precipitation data from 1929 to 2022.