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Weather Forecast for Fontana

Now
Current Weather Conditions
53° F

Wind: 0 mph
Humidity: 56%
Clouds: 75%
Pressure: 1018 hPa
Sunrise: 10:53 AM ET
Sunset: 9:08 PM ET
Tomorrow
Tomorrow's Weather Conditions
Mostly Cloudy


Chance
Showers
Fri
Fri's Weather Conditions
Slight Chance
Showers

Slight Chance
Showers


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 2:36 am PST Jan 21, 2026
 
Today

Today: Mostly cloudy, with a high near 73. Calm wind becoming southwest around 5 mph in the afternoon.
High: 73 °F
Tonight

Tonight: Mostly cloudy, with a low around 52. West wind around 5 mph becoming calm.
Low: 52 °F
Thursday

Thursday: A chance of showers after 10am.  Mostly cloudy, with a high near 66. Calm wind becoming southwest around 5 mph in the afternoon.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
High: 66 °F
Thursday
Night
Thursday Night: A slight chance of showers.  Mostly cloudy, with a low around 51. West wind 5 to 10 mph becoming light  in the evening.  Chance of precipitation is 20%.
Low: 51 °F
Friday

Friday: A slight chance of showers.  Partly sunny, with a high near 65. Calm wind becoming southwest around 5 mph in the afternoon.  Chance of precipitation is 20%.
High: 65 °F
Friday
Night
Friday Night: A slight chance of showers before 10pm.  Mostly cloudy, with a low around 51. Chance of precipitation is 20%.
Low: 51 °F
Saturday

Saturday: A slight chance of showers after 10am.  Mostly sunny, with a high near 66. Chance of precipitation is 20%.
High: 66 °F
Saturday
Night
Saturday Night: Mostly clear, with a low around 46.
Low: 46 °F
Sunday

Sunday: Sunny, with a high near 67.
High: 67 °F
Mostly Cloudy

Mostly Cloudy

Chance
Showers
Slight Chance
Showers
Slight Chance
Showers
Slight Chance
Showers then
Mostly Cloudy
Slight Chance
Showers
Mostly Clear

Sunny

Dense Fog Advisory


Today
 
Mostly cloudy, with a high near 73. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
 
Mostly cloudy, with a low around 52. West wind around 5 mph becoming calm.
Thursday
 
A chance of showers after 10am. Mostly cloudy, with a high near 66. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
 
A slight chance of showers. Mostly cloudy, with a low around 51. West wind 5 to 10 mph becoming light in the evening. Chance of precipitation is 20%.
Friday
 
A slight chance of showers. Partly sunny, with a high near 65. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
 
A slight chance of showers before 10pm. Mostly cloudy, with a low around 51. Chance of precipitation is 20%.
Saturday
 
A slight chance of showers after 10am. Mostly sunny, with a high near 66. Chance of precipitation is 20%.
Saturday Night
 
Mostly clear, with a low around 46.
Sunday
 
Sunny, with a high near 67.
Sunday Night
 
Partly cloudy, with a low around 47.
Monday
 
Mostly sunny, with a high near 69.
Monday Night
 
Mostly clear, with a low around 47.
Tuesday
 
Mostly sunny, with a high near 71.

Forecast from NOAA-NWS for Fontana.



 


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