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Weather Forecast for Fontana

Now
Current Weather Conditions
73° F

Wind: 3.44 mph
Humidity: 55%
Clouds: 0%
Pressure: 1011 hPa
Sunrise: 8:38 AM ET
Sunset: 11:03 PM ET
Tomorrow
Tomorrow's Weather Conditions
Sunny

Mostly Clear
Thu
Thu's Weather Conditions
Sunny

Mostly Clear


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:59 pm PDT Jun 16, 2025
 
Overnight

Overnight: Mostly clear, with a low around 65. West wind around 5 mph becoming calm.
Low: 65 °F
Tuesday

Tuesday: Sunny, with a high near 97. Light southwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
High: 97 °F
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 66. West wind 10 to 15 mph becoming light  after midnight. Winds could gust as high as 20 mph.
Low: 66 °F
Wednesday

Wednesday: Sunny, with a high near 96. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
High: 96 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 63. West wind 5 to 15 mph, with gusts as high as 20 mph.
Low: 63 °F
Juneteenth

Juneteenth: Sunny, with a high near 90.
High: 90 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 63.
Low: 63 °F
Friday

Friday: Sunny, with a high near 89.
High: 89 °F
Friday
Night
Friday Night: Mostly clear, with a low around 60.
Low: 60 °F
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear

Heat Advisory


Overnight
 
Mostly clear, with a low around 65. West wind around 5 mph becoming calm.
Tuesday
 
Sunny, with a high near 97. Light southwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Tuesday Night
 
Mostly clear, with a low around 66. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.
Wednesday
 
Sunny, with a high near 96. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
Mostly clear, with a low around 63. West wind 5 to 15 mph, with gusts as high as 20 mph.
Juneteenth
 
Sunny, with a high near 90.
Thursday Night
 
Mostly clear, with a low around 63.
Friday
 
Sunny, with a high near 89.
Friday Night
 
Mostly clear, with a low around 60.
Saturday
 
Patchy fog before 11am. Otherwise, sunny, with a high near 84.
Saturday Night
 
Mostly clear, with a low around 58.
Sunday
 
Patchy fog. Otherwise, sunny, with a high near 85.
Sunday Night
 
Mostly clear, with a low around 60.
Monday
 
Patchy fog. Otherwise, sunny, with a high near 86.

Forecast from NOAA-NWS for Fontana.



 


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