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Weather Forecast for Fontana

Now
Current Weather Conditions
46° F

Wind: 6.91 mph
Humidity: 87%
Clouds: 100%
Pressure: 1013 hPa
Sunrise: 10:30 AM ET
Sunset: 9:37 PM ET
Tomorrow
Tomorrow's Weather Conditions
Chance Rain

Mostly Sunny
Sat
Sat's Weather Conditions
Mostly Clear

Sunny


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 3:27 am PST Feb 19, 2026
 
Today

Today: Rain, mainly before 4pm. The rain could be heavy at times.  High near 52. Breezy, with a south wind 10 to 15 mph becoming west 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
High: 52 °F
Tonight

Tonight: A chance of rain before 7pm, then scattered showers, mainly between 7pm and 10pm.  Mostly cloudy, with a low around 39. Southwest wind 5 to 15 mph becoming east after midnight. Winds could gust as high as 25 mph.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Low: 39 °F
Friday

Friday: Mostly sunny, with a high near 55. East wind around 5 mph becoming calm.
High: 55 °F
Friday
Night
Friday Night: Mostly clear, with a low around 41. West wind 5 to 10 mph becoming light and variable  in the evening.
Low: 41 °F
Saturday

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

Sunday: Sunny, with a high near 72.
High: 72 °F
Sunday
Night
Sunday Night: Partly cloudy, with a low around 51.
Low: 51 °F
Monday

Monday: Mostly sunny, with a high near 77.
High: 77 °F
Heavy Rain
and Breezy
Chance Rain
Mostly Sunny
Mostly Clear
Sunny
Partly Cloudy
Sunny
Partly Cloudy
Mostly Sunny

Wind Advisory


Today
 
Rain, mainly before 4pm. The rain could be heavy at times. High near 52. Breezy, with a south wind 10 to 15 mph becoming west 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
 
A chance of rain before 7pm, then scattered showers, mainly between 7pm and 10pm. Mostly cloudy, with a low around 39. Southwest wind 5 to 15 mph becoming east after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
 
Mostly sunny, with a high near 55. East wind around 5 mph becoming calm.
Friday Night
 
Mostly clear, with a low around 41. West wind 5 to 10 mph becoming light and variable in the evening.
Saturday
 
Sunny, with a high near 66. North wind around 5 mph becoming southeast in the afternoon.
Saturday Night
 
Partly cloudy, with a low around 48.
Sunday
 
Sunny, with a high near 72.
Sunday Night
 
Partly cloudy, with a low around 51.
Monday
 
Mostly sunny, with a high near 77.
Monday Night
 
Partly cloudy, with a low around 56.
Tuesday
 
Mostly sunny, with a high near 75.
Tuesday Night
 
A slight chance of showers. Partly cloudy, with a low around 55.
Wednesday
 
A slight chance of showers. Mostly sunny, with a high near 73.

Forecast from NOAA-NWS for Fontana.



 


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