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Weather Forecast for Fontana

Now
Current Weather Conditions
52° F

Wind: 6.91 mph
Humidity: 92%
Clouds: 100%
Pressure: 1015 hPa
Sunrise: 10:53 AM ET
Sunset: 8:47 PM ET
Tomorrow
Tomorrow's Weather Conditions
Mostly Sunny


Mostly Clear

Mon
Mon's Weather Conditions
Sunny


Mostly Clear



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:13 pm PST Dec 26, 2025
 
Tonight

Tonight: Showers likely and possibly a thunderstorm before 10pm, then a slight chance of showers.  Cloudy, then gradually becoming partly cloudy, with a low around 45. South wind around 5 mph becoming calm  after midnight.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Low: 45 °F
Saturday

Saturday: Mostly sunny, with a high near 58. Calm wind becoming southwest around 5 mph in the afternoon.
High: 58 °F
Saturday
Night
Saturday Night: Mostly clear, with a low around 43. Light and variable wind becoming north 5 to 10 mph after midnight.
Low: 43 °F
Sunday

Sunday: Sunny, with a high near 61. North wind 15 to 20 mph, with gusts as high as 35 mph.
High: 61 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 44. Northeast wind around 15 mph, with gusts as high as 35 mph.
Low: 44 °F
Monday

Monday: Sunny, with a high near 64.
High: 64 °F
Monday
Night
Monday Night: Mostly clear, with a low around 45.
Low: 45 °F
Tuesday

Tuesday: Sunny, with a high near 67.
High: 67 °F
Tuesday
Night
Tuesday Night: A slight chance of showers after 10pm.  Partly cloudy, with a low around 48.
Low: 48 °F
Showers
Likely then
Slight Chance
Showers
Mostly Sunny

Mostly Clear

Sunny

Mostly Clear

Sunny

Mostly Clear

Sunny

Slight Chance
Showers


Tonight
 
Showers likely and possibly a thunderstorm before 10pm, then a slight chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 45. South wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
Mostly sunny, with a high near 58. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
 
Mostly clear, with a low around 43. Light and variable wind becoming north 5 to 10 mph after midnight.
Sunday
 
Sunny, with a high near 61. North wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday Night
 
Mostly clear, with a low around 44. Northeast wind around 15 mph, with gusts as high as 35 mph.
Monday
 
Sunny, with a high near 64.
Monday Night
 
Mostly clear, with a low around 45.
Tuesday
 
Sunny, with a high near 67.
Tuesday Night
 
A slight chance of showers after 10pm. Partly cloudy, with a low around 48.
Wednesday
 
A chance of showers, mainly after 10am. Partly sunny, with a high near 67.
Wednesday Night
 
Showers likely. Mostly cloudy, with a low around 50.
New Year's Day
 
Showers likely. Mostly cloudy, with a high near 64.
Thursday Night
 
Showers likely. Mostly cloudy, with a low around 51.
Friday
 
Showers likely. Mostly cloudy, with a high near 65.

Forecast from NOAA-NWS for Fontana.



 


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