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Weather Forecast for Fontana

Now
Current Weather Conditions
56° F

Wind: 4.61 mph
Humidity: 77%
Clouds: 0%
Pressure: 1019 hPa
Sunrise: 10:53 AM ET
Sunset: 8:46 PM ET
Tomorrow
Tomorrow's Weather Conditions
Heavy Rain


Showers then
Chance
Showers
Sun
Sun's Weather Conditions
Mostly Sunny


Mostly Clear



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:54 pm PST Dec 25, 2025
 
Tonight

Tonight: Showers likely, mainly after 10pm.  Cloudy, with a low around 50. South wind around 5 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Low: 50 °F
Friday

Friday: Showers. The rain could be heavy at times.  High near 58. South wind around 5 mph.  Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
High: 58 °F
Friday
Night
Friday Night: Showers, mainly before 10pm.  Low around 45. South wind around 5 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Low: 45 °F
Saturday

Saturday: Mostly sunny, with a high near 58. Calm wind becoming west around 5 mph in the afternoon.
High: 58 °F
Saturday
Night
Saturday Night: Mostly clear, with a low around 42. North wind around 5 mph.
Low: 42 °F
Sunday

Sunday: Sunny, with a high near 62.
High: 62 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 45.
Low: 45 °F
Monday

Monday: Sunny, with a high near 65.
High: 65 °F
Monday
Night
Monday Night: Mostly clear, with a low around 46.
Low: 46 °F
Showers
Likely
Heavy Rain

Showers then
Chance
Showers
Mostly Sunny

Mostly Clear

Sunny

Mostly Clear

Sunny

Mostly Clear

Flood Watch


Tonight
 
Showers likely, mainly after 10pm. Cloudy, with a low around 50. South wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
 
Showers. The rain could be heavy at times. High near 58. South wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Friday Night
 
Showers, mainly before 10pm. Low around 45. South wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
 
Mostly sunny, with a high near 58. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
 
Mostly clear, with a low around 42. North wind around 5 mph.
Sunday
 
Sunny, with a high near 62.
Sunday Night
 
Mostly clear, with a low around 45.
Monday
 
Sunny, with a high near 65.
Monday Night
 
Mostly clear, with a low around 46.
Tuesday
 
Sunny, with a high near 69.
Tuesday Night
 
A slight chance of showers. Mostly clear, with a low around 47.
Wednesday
 
A chance of showers. Mostly sunny, with a high near 70.
Wednesday Night
 
A chance of showers. Mostly cloudy, with a low around 48.
New Year's Day
 
A chance of showers. Partly sunny, with a high near 65.

Forecast from NOAA-NWS for Fontana.



 


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