Mariposa projected high temperature for Wednesday: 90 degrees and Thursday: 91 degrees

Oakhurst projected high temperature for Wednesday: 91 degrees and Thursday: 92 degrees

Yosemite Valley projected high temperature for Wednesday: 86 degrees and Thursday: 86 degrees

August 21, 2019 - The National Weather Service Hanford Office reports high temperatures Wednesday afternoon will generally be a degree or so warmer than Tuesday afternoon.

Maximum temperatures Wednesday afternoon will be near normal for this time of year.

High temperatures Thursday afternoon will be a degree or two warmer than Wednesday afternoon. Maximum temperatures Thursday afternoon will be one to three degrees above normal for this time of year.

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  Area Forecast Discussion 
  National Weather Service Hanford CA 
  333 AM PDT Wed Aug 21 2019 
   
   
  .SYNOPSIS...Temperatures will warm slightly but remain at or  
  below normal across the Central California Interior through  
  Thursday. Warming will continue through the weekend, with highs 
  topping out around 4-8 degrees above normal by early next week.  
  Dry weather will continue through the forecast period. 
   
  && 
   
  .DISCUSSION... 
  The high pressure ridge has been suppressed and displaced to the  
  south of California lately, resulting in a few days of below  
  normal temperatures across our area.  
   
  This pattern is progged to continue as a developing low pressure  
  trough swings into the Pacific Northwest coast and tracks inland  
  today through Thursday. This will help to maintain our  
  temperatures at or slightly below climo for a couple more days.  
   
  As the trough continues to lift out, the ridge will restrengthen  
  for the end of the week into early next week. By Friday, highs  
  will push a bit above seasonal averages and continue to trend  
  upward a few degrees through Monday. Widespread triple digit highs 
  will return to the San Joaquin Valley, lower foothills and desert 
  areas by the start of next week. 
   
  Models generally agree on a dry forecast through early next week  
  but there are some hints at possible moisture tracking into our  
  area near midweek as a disturbance drifts northwest offshore the  
  California coast. 

Source: NWS