Weather in Yosemite National Park
The Best Time To Visit Yosemite
You can count on blue skies and no rain during your 
summer stay in the park!!
Current Satellite | Current Yosemite Weather/Forecast | Current NEXRAD radar  

Fresno

San Francisco

Modesto

Sacramento

The weather in Yosemite National Park during the summer is very predictable.  From the middle of June until late September it rarely rains except for a rare, wandering afternoon thunderstorm that can produce lightening and moderate rain for a while at the higher elevations.  This happens mostly at Tuolumne Meadows and less so in the valley.  On balance, this may happen about once or twice a month (yes, that's a month) at most.  The humidity is very low as it is all over the San Joaquin Valley.  High temperatures range from low 90's (remember, low humidity) to high 70's. Average is about 75 to 90.   Lows can get rather chilly.  The valley is at the 4,000 ft. elevation, and can get quite cold at night, about 45 to 50 degrees.

During the spring, there is no telling what might happen.  It can be rainy and cold one day, and then have cobalt-blue skies and 80 degrees the next.

Winter is the exact opposite.  Storms come from out of nowhere, and it can rain and blow for a few days.  Yes, Yosemite is beautiful in winter, but be prepared.  DO NOT go far into the backcountry after October 1st.  Two miles in should be your limit; you need to be able to get out of the wilderness quickly in case of an early winter storm.