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Weather Forecast for Fontana

Now
Current Weather Conditions
75° F

Wind: 10.36 mph
Humidity: 50%
Clouds: 0%
Pressure: 1015 hPa
Sunrise: 9:28 AM ET
Sunset: 10:06 PM ET
Tomorrow
Tomorrow's Weather Conditions
Sunny

Increasing
Clouds
Thu
Thu's Weather Conditions
Patchy Fog
then Sunny

Mostly Clear


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 4:21 pm PDT Sep 8, 2025
 
Tonight

Tonight: Clear, with a low around 61. Southwest wind around 5 mph becoming calm  after midnight.
Low: 61 °F
Tuesday

Tuesday: Sunny, with a high near 84. Light south wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
High: 84 °F
Tuesday
Night
Tuesday Night: Increasing clouds, with a low around 58. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Low: 58 °F
Wednesday

Wednesday: Patchy fog before 11am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79. Light south wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
High: 79 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 57. West wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Low: 57 °F
Thursday

Thursday: Sunny, with a high near 79.
High: 79 °F
Thursday
Night
Thursday Night: Increasing clouds, with a low around 57.
Low: 57 °F
Friday

Friday: Patchy fog before 11am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81.
High: 81 °F
Friday
Night
Friday Night: Clear, with a low around 59.
Low: 59 °F
Clear
Sunny
Increasing
Clouds
Patchy Fog
then Sunny
Mostly Clear
Sunny
Increasing
Clouds
Patchy Fog
then Sunny
Clear


Tonight
 
Clear, with a low around 61. Southwest wind around 5 mph becoming calm after midnight.
Tuesday
 
Sunny, with a high near 84. Light south wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
Increasing clouds, with a low around 58. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Wednesday
 
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79. Light south wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
Mostly clear, with a low around 57. West wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Thursday
 
Sunny, with a high near 79.
Thursday Night
 
Increasing clouds, with a low around 57.
Friday
 
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81.
Friday Night
 
Clear, with a low around 59.
Saturday
 
Sunny, with a high near 86.
Saturday Night
 
Clear, with a low around 59.
Sunday
 
Sunny, with a high near 85.
Sunday Night
 
Clear, with a low around 59.
Monday
 
Sunny, with a high near 85.

Forecast from NOAA-NWS for Fontana.



 


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