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Weather Forecast for Fontana

Now
Current Weather Conditions
57° F

Wind: 10.36 mph
Humidity: 80%
Clouds: 100%
Pressure: 1015 hPa
Sunrise: 9:22 AM ET
Sunset: 10:18 PM ET
Tomorrow
Tomorrow's Weather Conditions
Slight Chance
Showers then
Partly Cloudy

Chance
Showers
Tue
Tue's Weather Conditions
Partly Cloudy


Sunny



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:04 am PDT Apr 12, 2026
 
Today

Today: Showers likely, with thunderstorms also possible after 11am.  Mostly cloudy, with a high near 62. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
High: 62 °F
Tonight

Tonight: A slight chance of showers before 11pm.  Mostly cloudy, with a low around 48. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 20%.
Low: 48 °F
Monday

Monday: A chance of showers, mainly after 11am.  Partly sunny, with a high near 64. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
High: 64 °F
Monday
Night
Monday Night: Partly cloudy, with a low around 49. Southwest wind 10 to 15 mph becoming light  after midnight. Winds could gust as high as 25 mph.
Low: 49 °F
Tuesday

Tuesday: Sunny, with a high near 72. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
High: 72 °F
Tuesday
Night
Tuesday Night: Clear, with a low around 50.
Low: 50 °F
Wednesday

Wednesday: Sunny, with a high near 74.
High: 74 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 53.
Low: 53 °F
Thursday

Thursday: Mostly sunny, with a high near 73.
High: 73 °F
Showers
Likely
Slight Chance
Showers then
Partly Cloudy
Chance
Showers
Partly Cloudy

Sunny

Clear

Sunny

Mostly Clear

Mostly Sunny


Today
 
Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 62. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
 
A slight chance of showers before 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday
 
A chance of showers, mainly after 11am. Partly sunny, with a high near 64. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
 
Partly cloudy, with a low around 49. Southwest wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 25 mph.
Tuesday
 
Sunny, with a high near 72. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
 
Clear, with a low around 50.
Wednesday
 
Sunny, with a high near 74.
Wednesday Night
 
Mostly clear, with a low around 53.
Thursday
 
Mostly sunny, with a high near 73.
Thursday Night
 
Mostly clear, with a low around 52.
Friday
 
Sunny, with a high near 76.
Friday Night
 
Clear, with a low around 52.
Saturday
 
Sunny, with a high near 81.

Forecast from NOAA-NWS for Fontana.



 


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