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Weather Forecast for Fontana

Now
Current Weather Conditions
58° F

Wind: 3.44 mph
Humidity: 90%
Clouds: 100%
Pressure: 1019 hPa
Sunrise: 10:55 AM ET
Sunset: 8:51 PM ET
Tomorrow
Tomorrow's Weather Conditions
Chance
Showers and
Patchy Fog

Chance
Showers and
Patchy Fog
then Showers
Sun
Sun's Weather Conditions
Showers then
Chance
Showers

Showers
Likely



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 2:47 am PST Jan 2, 2026
 
Today

Today: Mostly sunny, with a high near 64. Calm wind becoming southwest around 5 mph in the afternoon.
High: 64 °F
Tonight

Tonight: A chance of showers, mainly between 10pm and 4am.  Patchy fog after 1am.  Otherwise, mostly cloudy, with a low around 53. Calm wind.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Low: 53 °F
Saturday

Saturday: Showers, mainly after 4pm.  Patchy fog before 10am. High near 63. Calm wind becoming southwest around 5 mph in the afternoon.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
High: 63 °F
Saturday
Night
Saturday Night: Showers, mainly before 10pm.  Low around 54. Southwest wind 5 to 10 mph becoming southeast after midnight.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Low: 54 °F
Sunday

Sunday: Showers likely, mainly after 10am.  Mostly cloudy, with a high near 62. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
High: 62 °F
Sunday
Night
Sunday Night: Showers likely.  Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Low: 51 °F
Monday

Monday: A slight chance of showers.  Partly sunny, with a high near 61. Chance of precipitation is 20%.
High: 61 °F
Monday
Night
Monday Night: A chance of showers, mainly after 10pm.  Mostly cloudy, with a low around 48.
Low: 48 °F
Tuesday

Tuesday: A chance of showers, mainly before 10am.  Partly sunny, with a high near 60.
High: 60 °F
Mostly Sunny

Chance
Showers and
Patchy Fog
Chance
Showers and
Patchy Fog
then Showers
Showers then
Chance
Showers
Showers
Likely

Showers
Likely

Slight Chance
Showers

Chance
Showers

Chance
Showers


Today
 
Mostly sunny, with a high near 64. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
 
A chance of showers, mainly between 10pm and 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 53. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
Showers, mainly after 4pm. Patchy fog before 10am. High near 63. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
 
Showers, mainly before 10pm. Low around 54. Southwest wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
 
Showers likely, mainly after 10am. Mostly cloudy, with a high near 62. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
 
Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Monday
 
A slight chance of showers. Partly sunny, with a high near 61. Chance of precipitation is 20%.
Monday Night
 
A chance of showers, mainly after 10pm. Mostly cloudy, with a low around 48.
Tuesday
 
A chance of showers, mainly before 10am. Partly sunny, with a high near 60.
Tuesday Night
 
A slight chance of showers before 10pm. Partly cloudy, with a low around 46.
Wednesday
 
Mostly sunny, with a high near 61.
Wednesday Night
 
A slight chance of showers. Mostly cloudy, with a low around 44.
Thursday
 
A slight chance of showers. Mostly sunny, with a high near 60.

Forecast from NOAA-NWS for Fontana.



 


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