Records for Alturas Area, California (AATthr) on 05-21
  Record Highs
  
    - 
      1:  94°F (1967)
    
- 
      2:  89°F (1963)
    
- 
      3:  88°F (1966)
    
 
  Record Lows
  
    - 
      1:  23°F (1992)
    
- 
      2:  23°F (1974)
    
- 
      3:  26°F (2022)
    
 
  Lowest Highs
  
    - 
      1:  50°F (1963)
    
- 
      2:  48°F (2012)
    
- 
      3:  46°F (2006)
    
 
  Highest Lows
  
    - 
      1:  42°F (1962)
    
- 
      2:  50°F (2002)
    
- 
      3:  52°F (2010)
    
 
  Highest May temperature:
  
  95°F on 05-29-1983.
  Lowest May temperature:
  
  14°F on 05-06-2010.
  Average temperature is 55°F
  Average high is 71.5°F
  Average low is 38.6°F
 
  Temperature data from 1935 to 2022.
  Record Precipitation
  
    - 
      1:  0.43" (2015)
    
- 
      2:  0.26" (1953)
    
- 
      3:  0.24" (1948)
    
 
  Precipitation data from 1935 to 2022.