Records for Portland Area, Maine (PWMthr) on 05-23
  Record Highs
  
    - 
      1:  87°F (1992)
    
- 
      2:  86°F (1964)
    
- 
      3:  84°F (2021)
    
 
  Record Lows
  
    - 
      1:  34°F (1963)
    
- 
      2:  37°F (1968)
    
- 
      3:  37°F (1956)
    
 
  Lowest Highs
  
    - 
      1:  59°F (2012)
    
- 
      2:  57°F (1977)
    
- 
      3:  57°F (1955)
    
 
  Highest Lows
  
    - 
      1:  48°F (1974)
    
- 
      2:  50°F (2011)
    
- 
      3:  51°F (2003)
    
 
  Highest May temperature:
  
  94°F on 05-31-1987.
  Lowest May temperature:
  
  23°F on 05-09-1956.
  Average temperature is 56.9°F
  Average high is 66.1°F
  Average low is 47.7°F
 
  Temperature data from 1874 to 2022.
  Record Precipitation
  
    - 
      1:  0.89" (1974)
    
- 
      2:  0.88" (1872)
    
- 
      3:  0.87" (2005)
    
 
  Precipitation data from 1871 to 2022.