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Weather Forecast for Fontana

Now
Current Weather Conditions
55° F

Wind: 6.91 mph
Humidity: 35%
Clouds: 0%
Pressure: 1018 hPa
Sunrise: 10:54 AM ET
Sunset: 9:04 PM ET
Tomorrow
Tomorrow's Weather Conditions
Mostly Clear

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: 1:07 am PST Jan 17, 2026
 
Today

Today: Sunny, with a high near 78. Breezy, with a north wind around 25 mph, with gusts as high as 40 mph.
High: 78 °F
Tonight

Tonight: Mostly clear, with a low around 55. North wind 15 to 20 mph, with gusts as high as 30 mph.
Low: 55 °F
Sunday

Sunday: Mostly sunny, with a high near 79. North wind around 10 mph, with gusts as high as 20 mph.
High: 79 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 52. North wind around 10 mph, with gusts as high as 20 mph.
Low: 52 °F
M.L.King
Day
M.L.King Day: Sunny, with a high near 78. North wind 15 to 20 mph, with gusts as high as 30 mph.
High: 78 °F
Monday
Night
Monday Night: Mostly clear, with a low around 53.
Low: 53 °F
Tuesday

Tuesday: Sunny, with a high near 77.
High: 77 °F
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 51.
Low: 51 °F
Wednesday

Wednesday: Sunny, with a high near 73.
High: 73 °F
Sunny and
Breezy
Mostly Clear
Mostly Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny


Today
 
Sunny, with a high near 78. Breezy, with a north wind around 25 mph, with gusts as high as 40 mph.
Tonight
 
Mostly clear, with a low around 55. North wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
 
Mostly sunny, with a high near 79. North wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
 
Mostly clear, with a low around 52. North wind around 10 mph, with gusts as high as 20 mph.
M.L.King Day
 
Sunny, with a high near 78. North wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
 
Mostly clear, with a low around 53.
Tuesday
 
Sunny, with a high near 77.
Tuesday Night
 
Mostly clear, with a low around 51.
Wednesday
 
Sunny, with a high near 73.
Wednesday Night
 
Partly cloudy, with a low around 50.
Thursday
 
Mostly sunny, with a high near 70.
Thursday Night
 
Partly cloudy, with a low around 49.
Friday
 
Partly sunny, with a high near 66.

Forecast from NOAA-NWS for Fontana.



 


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