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Weather Forecast for Fontana

Now
Current Weather Conditions
74° F

Wind: 0 mph
Humidity: 30%
Clouds: 20%
Pressure: 1019 hPa
Sunrise: 10:48 AM ET
Sunset: 8:42 PM ET
Tomorrow
Tomorrow's Weather Conditions
Mostly Clear

Sunny
Thu
Thu's Weather Conditions
Mostly Clear

Sunny


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 3:01 am PST Dec 16, 2025
 
Today

Today: Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
High: 80 °F
Tonight

Tonight: Mostly clear, with a low around 55. Southwest wind around 5 mph becoming east after midnight.
Low: 55 °F
Wednesday

Wednesday: Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
High: 78 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 55. Light and variable wind becoming north 5 to 10 mph after midnight.
Low: 55 °F
Thursday

Thursday: Sunny, with a high near 82. Northeast wind around 5 mph becoming calm  in the afternoon.
High: 82 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 57.
Low: 57 °F
Friday

Friday: Sunny, with a high near 80.
High: 80 °F
Friday
Night
Friday Night: Mostly clear, with a low around 54.
Low: 54 °F
Saturday

Saturday: Mostly sunny, with a high near 76.
High: 76 °F
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Mostly Sunny

Air Quality Alert


Today
 
Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
 
Mostly clear, with a low around 55. Southwest wind around 5 mph becoming east after midnight.
Wednesday
 
Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
 
Mostly clear, with a low around 55. Light and variable wind becoming north 5 to 10 mph after midnight.
Thursday
 
Sunny, with a high near 82. Northeast wind around 5 mph becoming calm in the afternoon.
Thursday Night
 
Mostly clear, with a low around 57.
Friday
 
Sunny, with a high near 80.
Friday Night
 
Mostly clear, with a low around 54.
Saturday
 
Mostly sunny, with a high near 76.
Saturday Night
 
Partly cloudy, with a low around 54.
Sunday
 
Mostly sunny, with a high near 74.
Sunday Night
 
Mostly cloudy, with a low around 53.
Monday
 
Mostly sunny, with a high near 76.

Forecast from NOAA-NWS for Fontana.



 


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