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Weather Forecast for Fontana

Now
Current Weather Conditions
66° F

Wind: 4.61 mph
Humidity: 56%
Clouds: 0%
Pressure: 1017 hPa
Sunrise: 9:18 AM ET
Sunset: 10:20 PM ET
Tomorrow
Tomorrow's Weather Conditions
Mostly Clear
then Patchy
Fog

Patchy Fog
then Partly
Sunny
Fri
Fri's Weather Conditions
Mostly Clear
then Mostly
Clear and
Windy

Sunny and
Windy



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:09 am PDT Apr 15, 2026
 
Today

Today: Sunny, with a high near 77. Light south wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
High: 77 °F
Tonight

Tonight: Patchy fog after 2am.  Otherwise, increasing clouds, with a low around 53. West wind 10 to 15 mph becoming light  after midnight. Winds could gust as high as 20 mph.
Low: 53 °F
Thursday

Thursday: Patchy fog before 11am.  Otherwise, partly sunny, with a high near 74. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
High: 74 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 51. Windy, with a west wind 15 to 20 mph becoming north 25 to 30 mph in the evening. Winds could gust as high as 50 mph.
Low: 51 °F
Friday

Friday: Sunny, with a high near 74. Windy, with a north wind 25 to 30 mph decreasing to 20 to 25 mph in the afternoon. Winds could gust as high as 45 mph.
High: 74 °F
Friday
Night
Friday Night: Clear, with a low around 52.
Low: 52 °F
Saturday

Saturday: Sunny, with a high near 82.
High: 82 °F
Saturday
Night
Saturday Night: Partly cloudy, with a low around 56.
Low: 56 °F
Sunday

Sunday: Mostly sunny, with a high near 83.
High: 83 °F
Sunny

Mostly Clear
then Patchy
Fog
Patchy Fog
then Partly
Sunny
Mostly Clear
then Mostly
Clear and
Windy
Sunny and
Windy

Clear

Sunny

Partly Cloudy

Mostly Sunny


Today
 
Sunny, with a high near 77. Light south wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tonight
 
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.
Thursday
 
Patchy fog before 11am. Otherwise, partly sunny, with a high near 74. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
 
Mostly clear, with a low around 51. Windy, with a west wind 15 to 20 mph becoming north 25 to 30 mph in the evening. Winds could gust as high as 50 mph.
Friday
 
Sunny, with a high near 74. Windy, with a north wind 25 to 30 mph decreasing to 20 to 25 mph in the afternoon. Winds could gust as high as 45 mph.
Friday Night
 
Clear, with a low around 52.
Saturday
 
Sunny, with a high near 82.
Saturday Night
 
Partly cloudy, with a low around 56.
Sunday
 
Mostly sunny, with a high near 83.
Sunday Night
 
Mostly clear, with a low around 53.
Monday
 
Sunny, with a high near 78.
Monday Night
 
Mostly clear, with a low around 52.
Tuesday
 
Sunny, with a high near 75.

Forecast from NOAA-NWS for Fontana.



 


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