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Weather Forecast for Fontana

Now
Current Weather Conditions
63° F

Wind: 20.71 mph
Humidity: 60%
Clouds: 75%
Pressure: 1010 hPa
Sunrise: 9:06 AM ET
Sunset: 10:28 PM ET
Tomorrow
Tomorrow's Weather Conditions
Showers
Likely

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


Becoming
Sunny


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:19 pm PDT Apr 25, 2026
 
This
Afternoon
This Afternoon: A slight chance of showers.  Mostly cloudy, with a high near 67. Southwest wind around 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 20%.
High: 67 °F
Tonight

Tonight: Showers likely, mainly after 11pm.  Mostly cloudy, with a low around 51. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Low: 51 °F
Sunday

Sunday: A slight chance of showers before 11am.  Mostly sunny, with a high near 65. Southwest wind 10 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 20%.
High: 65 °F
Sunday
Night
Sunday Night: Mostly cloudy, with a low around 51. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Low: 51 °F
Monday

Monday: Partly sunny, then gradually becoming sunny, with a high near 68. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
High: 68 °F
Monday
Night
Monday Night: Mostly clear, with a low around 50.
Low: 50 °F
Tuesday

Tuesday: Sunny, with a high near 77.
High: 77 °F
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 54.
Low: 54 °F
Wednesday

Wednesday: Mostly sunny, with a high near 78.
High: 78 °F
Slight Chance
Showers
Showers
Likely
Slight Chance
Showers then
Mostly Sunny
Mostly Cloudy

Becoming
Sunny
Mostly Clear

Sunny

Mostly Clear

Mostly Sunny


This Afternoon
 
A slight chance of showers. Mostly cloudy, with a high near 67. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tonight
 
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 51. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
 
A slight chance of showers before 11am. Mostly sunny, with a high near 65. Southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday Night
 
Mostly cloudy, with a low around 51. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday
 
Partly sunny, then gradually becoming sunny, with a high near 68. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Monday Night
 
Mostly clear, with a low around 50.
Tuesday
 
Sunny, with a high near 77.
Tuesday Night
 
Mostly clear, with a low around 54.
Wednesday
 
Mostly sunny, with a high near 78.
Wednesday Night
 
A slight chance of showers after 11pm. Partly cloudy, with a low around 54.
Thursday
 
Mostly sunny, with a high near 77.
Thursday Night
 
Mostly clear, with a low around 55.
Friday
 
Sunny, with a high near 83.
Friday Night
 
Mostly clear, with a low around 57.
Saturday
 
Sunny, with a high near 85.

Forecast from NOAA-NWS for Fontana.



 


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