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Weather Forecast for Fontana

Now
Current Weather Conditions
63° F

Wind: 3.44 mph
Humidity: 43%
Clouds: 0%
Pressure: 1016 hPa
Sunrise: 9:30 AM ET
Sunset: 10:13 PM ET
Tomorrow
Tomorrow's Weather Conditions
Becoming
Sunny

Mostly Clear
Wed
Wed's Weather Conditions
Sunny

Mostly Clear


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 1:53 am PDT Apr 6, 2026
 
Overnight

Overnight: Cloudy, with a low around 59. Calm wind.
Low: 59 °F
Monday

Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 81. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
High: 81 °F
Monday
Night
Monday Night: Mostly clear, with a low around 55. Southwest wind 10 to 15 mph becoming light west  after midnight. Winds could gust as high as 20 mph.
Low: 55 °F
Tuesday

Tuesday: Sunny, with a high near 82. Light southwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
High: 82 °F
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 57. Southwest wind 5 to 10 mph becoming light west  in the evening. Winds could gust as high as 20 mph.
Low: 57 °F
Wednesday

Wednesday: Sunny, with a high near 82.
High: 82 °F
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 58.
Low: 58 °F
Thursday

Thursday: Partly sunny, with a high near 78.
High: 78 °F
Thursday
Night
Thursday Night: Mostly cloudy, with a low around 56.
Low: 56 °F
Cloudy
Becoming
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Partly Cloudy
Partly Sunny
Mostly Cloudy


Overnight
 
Cloudy, with a low around 59. Calm wind.
Monday
 
Mostly cloudy through mid morning, then gradual clearing, with a high near 81. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Monday Night
 
Mostly clear, with a low around 55. Southwest wind 10 to 15 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Tuesday
 
Sunny, with a high near 82. Light southwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
 
Mostly clear, with a low around 57. Southwest wind 5 to 10 mph becoming light west in the evening. Winds could gust as high as 20 mph.
Wednesday
 
Sunny, with a high near 82.
Wednesday Night
 
Partly cloudy, with a low around 58.
Thursday
 
Partly sunny, with a high near 78.
Thursday Night
 
Mostly cloudy, with a low around 56.
Friday
 
A slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 75.
Friday Night
 
A chance of showers. Partly cloudy, with a low around 55.
Saturday
 
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 67.
Saturday Night
 
A chance of showers. Mostly cloudy, with a low around 52.
Sunday
 
A slight chance of showers. Partly sunny, with a high near 68.

Forecast from NOAA-NWS for Fontana.



 


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