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Weather Forecast for Fontana

Now
Current Weather Conditions
68° F

Wind: 1.01 mph
Humidity: 66%
Clouds: 0%
Pressure: 1013 hPa
Sunrise: 9:26 AM ET
Sunset: 10:16 PM ET
Tomorrow
Tomorrow's Weather Conditions
Partly Cloudy


Mostly Sunny

Sat
Sat's Weather Conditions
Chance
Showers

Slight Chance
Showers


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 1:35 am PDT Apr 9, 2026
 
Today

Today: Mostly sunny, with a high near 81. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
High: 81 °F
Tonight

Tonight: Partly cloudy, with a low around 56. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Low: 56 °F
Friday

Friday: Mostly sunny, with a high near 75. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
High: 75 °F
Friday
Night
Friday Night: A chance of showers, mainly after 11pm.  Mostly cloudy, with a low around 56. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Low: 56 °F
Saturday

Saturday: A slight chance of showers.  Partly sunny, with a high near 68. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.  Chance of precipitation is 20%.
High: 68 °F
Saturday
Night
Saturday Night: Showers likely, mainly after 11pm.  Increasing clouds, with a low around 54. Chance of precipitation is 70%.
Low: 54 °F
Sunday

Sunday: Showers likely, with thunderstorms also possible after 11am.  Mostly cloudy, with a high near 63. Breezy.  Chance of precipitation is 70%.
High: 63 °F
Sunday
Night
Sunday Night: A slight chance of showers.  Partly cloudy, with a low around 48.
Low: 48 °F
Monday

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

Partly Cloudy

Mostly Sunny

Chance
Showers
Slight Chance
Showers
Showers
Likely
Showers
Likely and
Breezy
Slight Chance
Showers
Mostly Sunny


Today
 
Mostly sunny, with a high near 81. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Tonight
 
Partly cloudy, with a low around 56. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Friday
 
Mostly sunny, with a high near 75. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
 
A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 56. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
A slight chance of showers. Partly sunny, with a high near 68. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Saturday Night
 
Showers likely, mainly after 11pm. Increasing clouds, with a low around 54. Chance of precipitation is 70%.
Sunday
 
Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 63. Breezy. Chance of precipitation is 70%.
Sunday Night
 
A slight chance of showers. Partly cloudy, with a low around 48.
Monday
 
Mostly sunny, with a high near 65.
Monday Night
 
Mostly clear, with a low around 47.
Tuesday
 
Sunny, with a high near 73.
Tuesday Night
 
Mostly clear, with a low around 52.
Wednesday
 
Sunny, with a high near 78.

Forecast from NOAA-NWS for Fontana.



 


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