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Weather Forecast for Fontana

Now
Current Weather Conditions
79° F

Wind: 11.5 mph
Humidity: 32%
Clouds: 0%
Pressure: 1014 hPa
Sunrise: 9:12 AM ET
Sunset: 10:24 PM ET
Tomorrow
Tomorrow's Weather Conditions
Partly Cloudy


Slight Chance
Showers and
Patchy Fog
Wed
Wed's Weather Conditions
Chance
Showers then
Mostly Cloudy

Mostly Sunny



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 11:30 am PDT Apr 20, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 80. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
High: 80 °F
Tonight

Tonight: Partly cloudy, with a low around 51. Southwest wind 10 to 15 mph becoming light west  after midnight. Winds could gust as high as 25 mph.
Low: 51 °F
Tuesday

Tuesday: A slight chance of showers after 11am.  Patchy fog before 11am.  Otherwise, increasing clouds, with a high near 73. Light southwest wind increasing to 15 to 20 mph in the morning. Winds could gust as high as 30 mph.  Chance of precipitation is 20%.
High: 73 °F
Tuesday
Night
Tuesday Night: A chance of showers before 11pm.  Mostly cloudy, with a low around 51. Southwest wind 5 to 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Low: 51 °F
Wednesday

Wednesday: Mostly sunny, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
High: 71 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 49.
Low: 49 °F
Thursday

Thursday: Sunny, with a high near 77.
High: 77 °F
Thursday
Night
Thursday Night: Partly cloudy, with a low around 53.
Low: 53 °F
Friday

Friday: Mostly sunny, with a high near 76.
High: 76 °F
Sunny

Partly Cloudy

Slight Chance
Showers and
Patchy Fog
Chance
Showers then
Mostly Cloudy
Mostly Sunny

Mostly Clear

Sunny

Partly Cloudy

Mostly Sunny


This Afternoon
 
Sunny, with a high near 80. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
 
Partly cloudy, with a low around 51. Southwest wind 10 to 15 mph becoming light west after midnight. Winds could gust as high as 25 mph.
Tuesday
 
A slight chance of showers after 11am. Patchy fog before 11am. Otherwise, increasing clouds, with a high near 73. Light southwest wind increasing to 15 to 20 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Tuesday Night
 
A chance of showers before 11pm. Mostly cloudy, with a low around 51. Southwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
 
Mostly sunny, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
 
Mostly clear, with a low around 49.
Thursday
 
Sunny, with a high near 77.
Thursday Night
 
Partly cloudy, with a low around 53.
Friday
 
Mostly sunny, with a high near 76.
Friday Night
 
Partly cloudy, with a low around 54.
Saturday
 
A slight chance of showers. Partly sunny, with a high near 69.
Saturday Night
 
Mostly cloudy, with a low around 52.
Sunday
 
Partly sunny, with a high near 69.

Forecast from NOAA-NWS for Fontana.



 


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