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Weather Forecast for Fontana

Now
Current Weather Conditions
58° F

Wind: 12.66 mph
Humidity: 92%
Clouds: 100%
Pressure: 1015 hPa
Sunrise: 10:53 AM ET
Sunset: 8:45 PM ET
Tomorrow
Tomorrow's Weather Conditions
Chance
Showers


Showers

Sat
Sat's Weather Conditions
Showers


Showers
Likely then
Chance
Showers


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:42 pm PST Dec 24, 2025
 
Tonight

Tonight: Rain before 10pm, then a chance of showers after 10pm.  Low around 53. Calm wind becoming west around 5 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Low: 53 °F
Christmas
Day
Christmas Day: A chance of showers, with thunderstorms also possible after 10am.  Mostly cloudy, with a high near 62. South wind 5 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
High: 62 °F
Thursday
Night
Thursday Night: Showers, mainly after 10pm.  Low around 52. South wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Low: 52 °F
Friday

Friday: Showers.  High near 59. South wind 10 to 15 mph becoming light and variable  in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
High: 59 °F
Friday
Night
Friday Night: Showers likely, mainly before 10pm.  Mostly cloudy, with a low around 46. South wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Low: 46 °F
Saturday

Saturday: A slight chance of showers.  Mostly sunny, with a high near 59. Chance of precipitation is 20%.
High: 59 °F
Saturday
Night
Saturday Night: Mostly clear, with a low around 44.
Low: 44 °F
Sunday

Sunday: Sunny, with a high near 63.
High: 63 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 46.
Low: 46 °F
Rain then
Chance
Showers
Chance
Showers

Showers

Showers

Showers
Likely then
Chance
Showers
Slight Chance
Showers

Mostly Clear

Sunny

Mostly Clear

Flood Watch
Wind Advisory
Flood Advisory


Tonight
 
Rain before 10pm, then a chance of showers after 10pm. Low around 53. Calm wind becoming west around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Christmas Day
 
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 62. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
 
Showers, mainly after 10pm. Low around 52. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
 
Showers. High near 59. South wind 10 to 15 mph becoming light and variable in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
 
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 46. South wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
 
A slight chance of showers. Mostly sunny, with a high near 59. Chance of precipitation is 20%.
Saturday Night
 
Mostly clear, with a low around 44.
Sunday
 
Sunny, with a high near 63.
Sunday Night
 
Mostly clear, with a low around 46.
Monday
 
Sunny, with a high near 66.
Monday Night
 
Partly cloudy, with a low around 49.
Tuesday
 
A slight chance of showers. Mostly sunny, with a high near 69.
Tuesday Night
 
A chance of showers. Mostly cloudy, with a low around 51.
Wednesday
 
A chance of showers. Mostly cloudy, with a high near 69.

Forecast from NOAA-NWS for Fontana.



 


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