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Weather Forecast for Fontana

Now
Current Weather Conditions
57° F

Wind: 5.01 mph
Humidity: 41%
Clouds: 0%
Pressure: 1015 hPa
Sunrise: 10:29 AM ET
Sunset: 9:37 PM ET
Tomorrow
Tomorrow's Weather Conditions
Sunny

Partly Cloudy
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: 12:35 pm PST Feb 20, 2026
 
Tonight

Tonight: Clear, with a low around 40. West wind around 5 mph becoming calm.
Low: 40 °F
Saturday

Saturday: Sunny, with a high near 66. North wind around 5 mph becoming east in the afternoon.
High: 66 °F
Saturday
Night
Saturday Night: Partly cloudy, with a low around 48. Calm wind becoming northeast around 5 mph after midnight.
Low: 48 °F
Sunday

Sunday: Sunny, with a high near 74. Northeast wind 5 to 10 mph.
High: 74 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 51. North wind 5 to 10 mph.
Low: 51 °F
Monday

Monday: Mostly sunny, with a high near 78.
High: 78 °F
Monday
Night
Monday Night: Partly cloudy, with a low around 56.
Low: 56 °F
Tuesday

Tuesday: Mostly sunny, with a high near 78.
High: 78 °F
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 57.
Low: 57 °F
Clear
Sunny
Partly Cloudy
Sunny
Mostly Clear
Mostly Sunny
Partly Cloudy
Mostly Sunny
Partly Cloudy


Tonight
 
Clear, with a low around 40. West wind around 5 mph becoming calm.
Saturday
 
Sunny, with a high near 66. North wind around 5 mph becoming east in the afternoon.
Saturday Night
 
Partly cloudy, with a low around 48. Calm wind becoming northeast around 5 mph after midnight.
Sunday
 
Sunny, with a high near 74. Northeast wind 5 to 10 mph.
Sunday Night
 
Mostly clear, with a low around 51. North wind 5 to 10 mph.
Monday
 
Mostly sunny, with a high near 78.
Monday Night
 
Partly cloudy, with a low around 56.
Tuesday
 
Mostly sunny, with a high near 78.
Tuesday Night
 
Partly cloudy, with a low around 57.
Wednesday
 
Mostly sunny, with a high near 77.
Wednesday Night
 
Partly cloudy, with a low around 57.
Thursday
 
Mostly sunny, with a high near 81.
Thursday Night
 
Partly cloudy, with a low around 59.
Friday
 
Mostly sunny, with a high near 84.

Forecast from NOAA-NWS for Fontana.



 


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