Records for Boston Area, Massachusetts (BOSthr) on 05-18
  Record Highs
  
    - 
      1:  95°F (2017)
    
- 
      2:  91°F (1936)
    
- 
      3:  90°F (1889)
    
 
  Record Lows
  
    - 
      1:  37°F (2002)
    
- 
      2:  38°F (1882)
    
- 
      3:  39°F (2003)
    
 
  Lowest Highs
  
    - 
      1:  71°F (2017)
    
- 
      2:  63°F (1896)
    
- 
      3:  62°F (1943)
    
 
  Highest Lows
  
    - 
      1:  46°F (2007)
    
- 
      2:  46°F (1881)
    
- 
      3:  47°F (1895)
    
 
  Highest May temperature:
  
  97°F on 05-26-1880.
  Lowest May temperature:
  
  31°F on 05-03-1882.
  Average temperature is 58.9°F
  Average high is 67°F
  Average low is 50.8°F
 
  Temperature data from 1872 to 2022.
  Record Precipitation
  
    - 
      1:  1.72" (2007)
    
- 
      2:  1.09" (2002)
    
- 
      3:  1.07" (1970)
    
 
  Precipitation data from 1872 to 2022.