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Weather Forecast for Fontana

Now
Current Weather Conditions
70° F

Wind: 4.61 mph
Humidity: 66%
Clouds: 0%
Pressure: 1013 hPa
Sunrise: 9:38 AM ET
Sunset: 10:09 PM ET
Tomorrow
Tomorrow's Weather Conditions
Showers
Likely

Slight Chance
Showers then
Mostly Sunny
Thu
Thu's Weather Conditions
Mostly Cloudy


Partly Sunny



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:08 pm PDT Mar 31, 2026
 
This
Afternoon
This Afternoon: A slight chance of showers.  Cloudy, with a high near 73. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 20%.
High: 73 °F
Tonight

Tonight: Showers likely, mainly before 11pm.  Mostly cloudy, with a low around 56. Southwest wind 5 to 10 mph.  Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Low: 56 °F
Wednesday

Wednesday: A slight chance of showers before 11am.  Mostly sunny, with a high near 71. 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: 71 °F
Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 54. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Low: 54 °F
Thursday

Thursday: Partly sunny, with a high near 69. Southwest wind 5 to 10 mph.
High: 69 °F
Thursday
Night
Thursday Night: Partly cloudy, with a low around 51.
Low: 51 °F
Friday

Friday: Mostly sunny, with a high near 79. Windy.
High: 79 °F
Friday
Night
Friday Night: Partly cloudy, with a low around 56.
Low: 56 °F
Saturday

Saturday: Mostly sunny, with a high near 84.
High: 84 °F
Slight Chance
Showers
Showers
Likely
Slight Chance
Showers then
Mostly Sunny
Mostly Cloudy

Partly Sunny

Partly Cloudy

Mostly Sunny
and Windy
Partly Cloudy

Mostly Sunny


This Afternoon
 
A slight chance of showers. Cloudy, with a high near 73. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
 
Showers likely, mainly before 11pm. Mostly cloudy, with a low around 56. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
 
A slight chance of showers before 11am. Mostly sunny, with a high near 71. 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%.
Wednesday Night
 
Mostly cloudy, with a low around 54. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
 
Partly sunny, with a high near 69. Southwest wind 5 to 10 mph.
Thursday Night
 
Partly cloudy, with a low around 51.
Friday
 
Mostly sunny, with a high near 79. Windy.
Friday Night
 
Partly cloudy, with a low around 56.
Saturday
 
Mostly sunny, with a high near 84.
Saturday Night
 
Mostly clear, with a low around 55.
Sunday
 
Sunny, with a high near 86.
Sunday Night
 
Partly cloudy, with a low around 57.
Monday
 
Partly sunny, with a high near 82.

Forecast from NOAA-NWS for Fontana.



 


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