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Weather Forecast for Fontana

Now
Current Weather Conditions
59° F

Wind: 0 mph
Humidity: 50%
Clouds: 40%
Pressure: 1018 hPa
Sunrise: 10:49 AM ET
Sunset: 8:42 PM ET
Tomorrow
Tomorrow's Weather Conditions
Clear

Sunny
Fri
Fri's Weather Conditions
Mostly Clear

Sunny


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 3:03 am PST Dec 17, 2025
 
Today

Today: Sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon.
High: 77 °F
Tonight

Tonight: Clear, with a low around 55. Light and variable wind becoming north 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Low: 55 °F
Thursday

Thursday: Sunny, with a high near 83. North wind 5 to 10 mph becoming light and variable.
High: 83 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 57. Calm wind becoming northeast around 5 mph.
Low: 57 °F
Friday

Friday: Sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon.
High: 79 °F
Friday
Night
Friday Night: Mostly clear, with a low around 54.
Low: 54 °F
Saturday

Saturday: Sunny, with a high near 76.
High: 76 °F
Saturday
Night
Saturday Night: Partly cloudy, with a low around 54.
Low: 54 °F
Sunday

Sunday: Partly sunny, with a high near 75.
High: 75 °F
Sunny
Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Partly Cloudy
Partly Sunny

Air Quality Alert


Today
 
Sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
 
Clear, with a low around 55. Light and variable wind becoming north 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Thursday
 
Sunny, with a high near 83. North wind 5 to 10 mph becoming light and variable.
Thursday Night
 
Mostly clear, with a low around 57. Calm wind becoming northeast around 5 mph.
Friday
 
Sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
Mostly clear, with a low around 54.
Saturday
 
Sunny, with a high near 76.
Saturday Night
 
Partly cloudy, with a low around 54.
Sunday
 
Partly sunny, with a high near 75.
Sunday Night
 
Partly cloudy, with a low around 53.
Monday
 
Mostly sunny, with a high near 74.
Monday Night
 
Partly cloudy, with a low around 52.
Tuesday
 
A slight chance of showers. Partly sunny, with a high near 70.

Forecast from NOAA-NWS for Fontana.



 


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