Records for San Francisco Airport Area, California (SFOthr) on 08-21
  Record Highs
  
    - 
      1:  85°F (1974)
    
- 
      2:  82°F (1993)
    
- 
      3:  82°F (1945)
    
 
  Record Lows
  
    - 
      1:  48°F (1952)
    
- 
      2:  49°F (1955)
    
- 
      3:  50°F (1949)
    
 
  Lowest Highs
  
    - 
      1:  62°F (2003)
    
- 
      2:  61°F (2019)
    
- 
      3:  61°F (2017)
    
 
  Highest Lows
  
    - 
      1:  64°F (1946)
    
- 
      2:  65°F (2012)
    
- 
      3:  65°F (2010)
    
 
  Highest August temperature:
  
  99°F on 08-14-2020.
  Lowest August temperature:
  
  45°F on 08-03-1954.
  Average temperature is 65.1°F
  Average high is 73.7°F
  Average low is 56.5°F
 
  Temperature data from 1945 to 2022.
  Record Precipitation
  
    - 
      1:  0.04" (1968)
    
- 
      2:  0.00" (1991)
    
- 
      3:  0.00" (1990)
    
 
  Precipitation data from 1945 to 2022.