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Weather Forecast for Fontana

Now
Current Weather Conditions
93° F

Wind: 5.75 mph
Humidity: 30%
Clouds: 0%
Pressure: 1013 hPa
Sunrise: 9:33 AM ET
Sunset: 9:55 PM ET
Tomorrow
Tomorrow's Weather Conditions
Mostly Clear


Mostly Sunny

Thu
Thu's Weather Conditions
Chance
Showers


Showers
Likely



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 3:29 am PDT Sep 16, 2025
 
This
Afternoon
This Afternoon: Sunny, with a high near 98. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
High: 98 °F
Tonight

Tonight: Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light  in the evening.
Low: 72 °F
Wednesday

Wednesday: Mostly sunny, with a high near 93. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
High: 93 °F
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms, mainly after 11pm.  Mostly cloudy, with a low around 70. Southwest wind around 5 mph.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Low: 70 °F
Thursday

Thursday: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a high near 85. East wind around 5 mph becoming west in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
High: 85 °F
Thursday
Night
Thursday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Low: 67 °F
Friday

Friday: A chance of showers and thunderstorms, mainly before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 83. Chance of precipitation is 30%.
High: 83 °F
Friday
Night
Friday Night: Mostly clear, with a low around 65.
Low: 65 °F
Saturday

Saturday: Sunny, with a high near 87.
High: 87 °F
Sunny

Mostly Clear

Mostly Sunny

Chance
Showers

Showers
Likely

Chance
T-storms then
Chance
Showers
Chance
T-storms

Mostly Clear

Sunny


This Afternoon
 
Sunny, with a high near 98. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
 
Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light in the evening.
Wednesday
 
Mostly sunny, with a high near 93. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
A chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 70. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
 
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. East wind around 5 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Friday
 
A chance of showers and thunderstorms, mainly before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 83. Chance of precipitation is 30%.
Friday Night
 
Mostly clear, with a low around 65.
Saturday
 
Sunny, with a high near 87.
Saturday Night
 
Mostly clear, with a low around 66.
Sunday
 
Sunny, with a high near 89.
Sunday Night
 
Mostly clear, with a low around 67.
Monday
 
Sunny, with a high near 93.

Forecast from NOAA-NWS for Fontana.



 


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