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Weather Forecast for Fontana

Now
Current Weather Conditions
66° F

Wind: 14.97 mph
Humidity: 59%
Clouds: 100%
Pressure: 1016 hPa
Sunrise: 9:11 AM ET
Sunset: 10:25 PM ET
Tomorrow
Tomorrow's Weather Conditions
Chance
Showers then
Mostly Cloudy

Decreasing
Clouds
Thu
Thu's Weather Conditions
Mostly Clear


Sunny



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:53 pm PDT Apr 21, 2026
 
This
Afternoon
This Afternoon: A slight chance of showers.  Mostly sunny early, then becoming cloudy, with a high near 73. Southwest wind around 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 20%.
High: 73 °F
Tonight

Tonight: A chance of showers before 11pm.  Mostly cloudy, with a low around 50. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Low: 50 °F
Wednesday

Wednesday: Mostly cloudy, then gradually becoming 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 50. Southwest wind 10 to 15 mph becoming light and variable  in the evening. Winds could gust as high as 20 mph.
Low: 50 °F
Thursday

Thursday: Sunny, with a high near 77. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
High: 77 °F
Thursday
Night
Thursday Night: Partly cloudy, with a low around 52.
Low: 52 °F
Friday

Friday: Mostly sunny, with a high near 76.
High: 76 °F
Friday
Night
Friday Night: Partly cloudy, with a low around 53.
Low: 53 °F
Saturday

Saturday: Partly sunny, with a high near 67.
High: 67 °F
Slight Chance
Showers
Chance
Showers then
Mostly Cloudy
Decreasing
Clouds
Mostly Clear

Sunny

Partly Cloudy

Mostly Sunny

Partly Cloudy

Partly Sunny


This Afternoon
 
A slight chance of showers. Mostly sunny early, then becoming cloudy, with a high near 73. Southwest wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tonight
 
A chance of showers before 11pm. Mostly cloudy, with a low around 50. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
 
Mostly cloudy, then gradually becoming 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 50. Southwest wind 10 to 15 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Thursday
 
Sunny, with a high near 77. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
 
Partly cloudy, with a low around 52.
Friday
 
Mostly sunny, with a high near 76.
Friday Night
 
Partly cloudy, with a low around 53.
Saturday
 
Partly sunny, with a high near 67.
Saturday Night
 
Mostly cloudy, with a low around 51.
Sunday
 
Mostly sunny, with a high near 69.
Sunday Night
 
Partly cloudy, with a low around 51.
Monday
 
Mostly sunny, with a high near 74.
Monday Night
 
A slight chance of showers. Partly cloudy, with a low around 52.
Tuesday
 
Mostly sunny, with a high near 74.

Forecast from NOAA-NWS for Fontana.



 


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