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Weather Forecast for Fontana

Now
Current Weather Conditions
81° F

Wind: 8.05 mph
Humidity: 11%
Clouds: 0%
Pressure: 1014 hPa
Sunrise: 9:14 AM ET
Sunset: 10:22 PM ET
Tomorrow
Tomorrow's Weather Conditions
Partly Cloudy

Mostly Sunny
Mon
Mon's Weather Conditions
Mostly Clear

Sunny


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:55 pm PDT Apr 18, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 84. North wind around 5 mph becoming southwest.
High: 84 °F
Tonight

Tonight: Partly cloudy, with a low around 58. West wind 10 to 15 mph becoming light and variable  in the evening. Winds could gust as high as 25 mph.
Low: 58 °F
Sunday

Sunday: Mostly sunny, with a high near 83. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
High: 83 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 53. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph in the evening. Winds could gust as high as 25 mph.
Low: 53 °F
Monday

Monday: Sunny, with a high near 81. Light west 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 51.
Low: 51 °F
Tuesday

Tuesday: Increasing clouds, with a high near 75.
High: 75 °F
Tuesday
Night
Tuesday Night: Showers likely, mainly before 11pm.  Mostly cloudy, with a low around 52.
Low: 52 °F
Wednesday

Wednesday: Mostly sunny, with a high near 70.
High: 70 °F
Sunny
Partly Cloudy
Mostly Sunny
Mostly Clear
Sunny
Mostly Clear
Increasing
Clouds
Showers
Likely
Mostly Sunny


This Afternoon
 
Sunny, with a high near 84. North wind around 5 mph becoming southwest.
Tonight
 
Partly cloudy, with a low around 58. West wind 10 to 15 mph becoming light and variable in the evening. Winds could gust as high as 25 mph.
Sunday
 
Mostly sunny, with a high near 83. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
 
Mostly clear, with a low around 53. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph in the evening. Winds could gust as high as 25 mph.
Monday
 
Sunny, with a high near 81. Light west 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 51.
Tuesday
 
Increasing clouds, with a high near 75.
Tuesday Night
 
Showers likely, mainly before 11pm. Mostly cloudy, with a low around 52.
Wednesday
 
Mostly sunny, with a high near 70.
Wednesday Night
 
Mostly clear, with a low around 50.
Thursday
 
Sunny, with a high near 75.
Thursday Night
 
Mostly clear, with a low around 52.
Friday
 
Mostly sunny, with a high near 75.

Forecast from NOAA-NWS for Fontana.



 


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