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Weather Forecast for Fontana

Now
Current Weather Conditions
61° F

Wind: 3.44 mph
Humidity: 62%
Clouds: 0%
Pressure: 1018 hPa
Sunrise: 10:55 AM ET
Sunset: 8:54 PM ET
Tomorrow
Tomorrow's Weather Conditions
Partly Cloudy


Mostly Sunny

Thu
Thu's Weather Conditions
Partly Cloudy


Mostly Sunny
then Sunny
and Breezy


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:23 pm PST Jan 6, 2026
 
This
Afternoon
This Afternoon: Mostly sunny, with a high near 64. Calm wind.
High: 64 °F
Tonight

Tonight: Partly cloudy, with a low around 47. Calm wind.
Low: 47 °F
Wednesday

Wednesday: Mostly sunny, with a high near 63. Light and variable wind becoming southwest 5 to 10 mph in the morning.
High: 63 °F
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 45. Calm wind becoming northeast around 5 mph in the evening.
Low: 45 °F
Thursday

Thursday: Partly sunny, then gradually becoming sunny, with a high near 60. Breezy, with a light and variable wind becoming north 20 to 25 mph in the morning. Winds could gust as high as 40 mph.
High: 60 °F
Thursday
Night
Thursday Night: Clear, with a low around 42. Windy.
Low: 42 °F
Friday

Friday: Sunny, with a high near 62. Windy.
High: 62 °F
Friday
Night
Friday Night: Clear, with a low around 43.
Low: 43 °F
Saturday

Saturday: Sunny, with a high near 65.
High: 65 °F
Mostly Sunny

Partly Cloudy

Mostly Sunny

Partly Cloudy

Mostly Sunny
then Sunny
and Breezy
Clear and
Windy
Sunny and
Windy
Clear

Sunny


This Afternoon
 
Mostly sunny, with a high near 64. Calm wind.
Tonight
 
Partly cloudy, with a low around 47. Calm wind.
Wednesday
 
Mostly sunny, with a high near 63. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
 
Partly cloudy, with a low around 45. Calm wind becoming northeast around 5 mph in the evening.
Thursday
 
Partly sunny, then gradually becoming sunny, with a high near 60. Breezy, with a light and variable wind becoming north 20 to 25 mph in the morning. Winds could gust as high as 40 mph.
Thursday Night
 
Clear, with a low around 42. Windy.
Friday
 
Sunny, with a high near 62. Windy.
Friday Night
 
Clear, with a low around 43.
Saturday
 
Sunny, with a high near 65.
Saturday Night
 
Mostly clear, with a low around 45.
Sunday
 
Sunny, with a high near 69.
Sunday Night
 
Mostly clear, with a low around 46.
Monday
 
Sunny, with a high near 70.

Forecast from NOAA-NWS for Fontana.



 


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