Records for Hillsboro Area, Oregon (HIOthr) on 05-22
  Record Highs
  
    - 
      1:  94°F (2001)
    
 
    - 
      2:  91°F (2017)
    
 
    - 
      3:  89°F (1988)
    
 
  
 
  Record Lows
  
    - 
      1:  32°F (1960)
    
 
    - 
      2:  35°F (1955)
    
 
    - 
      3:  35°F (1944)
    
 
  
 
  Lowest Highs
  
    - 
      1:  60°F (1958)
    
 
    - 
      2:  55°F (2017)
    
 
    - 
      3:  55°F (1941)
    
 
  
 
  Highest Lows
  
    - 
      1:  50°F (2013)
    
 
    - 
      2:  56°F (2010)
    
 
    - 
      3:  57°F (1960)
    
 
  
 
  Highest May temperature:
  
  100°F on 05-29-1983.
  Lowest May temperature:
  
  26°F on 05-08-1935.
  Average temperature is 58°F
  Average high is 69.9°F
  Average low is 46°F
 
  Temperature data from 1929 to 2022.
  Record Precipitation
  
    - 
      1:  1.00" (2013)
    
 
    - 
      2:  0.67" (2006)
    
 
    - 
      3:  0.37" (1942)
    
 
  
 
  Precipitation data from 1929 to 2022.