National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 1:43 am PDT Jul 5, 2025
 
Today

Today: Sunny, with a high near 93. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny
Tonight

Tonight: Clear, with a low around 62. West wind 10 to 15 mph becoming light  in the evening. Winds could gust as high as 20 mph.
Clear
Sunday

Sunday: Sunny, with a high near 92. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny
Sunday
Night
Sunday Night: Clear, with a low around 61. Southwest wind 10 to 15 mph becoming light west  after midnight. Winds could gust as high as 20 mph.
Clear
Monday

Monday: Sunny, with a high near 93. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Sunny
Monday
Night
Monday Night: Clear, with a low around 64.
Clear
Tuesday

Tuesday: Sunny, with a high near 96.
Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 70.
Mostly Clear
Wednesday

Wednesday: Sunny, with a high near 99.
Sunny
Hi 93 °F Lo 62 °F Hi 92 °F Lo 61 °F Hi 93 °F Lo 64 °F Hi 96 °F Lo 70 °F Hi 99 °F

 

Today
 
Sunny, with a high near 93. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
 
Clear, with a low around 62. West wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.
Sunday
 
Sunny, with a high near 92. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
 
Clear, with a low around 61. Southwest wind 10 to 15 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Monday
 
Sunny, with a high near 93. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Monday Night
 
Clear, with a low around 64.
Tuesday
 
Sunny, with a high near 96.
Tuesday Night
 
Mostly clear, with a low around 70.
Wednesday
 
Sunny, with a high near 99.
Wednesday Night
 
Mostly clear, with a low around 71.
Thursday
 
Sunny, with a high near 100.
Thursday Night
 
Mostly clear, with a low around 69.
Friday
 
Sunny, with a high near 96.

 

Forecast from NOAA-NWS for Fontana CA.