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Weather Forecast for Fontana

Now
Current Weather Conditions
59° F

Wind: 5.75 mph
Humidity: 92%
Clouds: 100%
Pressure: 1017 hPa
Sunrise: 10:55 AM ET
Sunset: 8:51 PM ET
Tomorrow
Tomorrow's Weather Conditions
Slight Chance
Showers then
Mostly Cloudy

Partly Sunny

Sat
Sat's Weather Conditions
Slight Chance
Showers

Chance
Showers


Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 8:01 am PST Jan 1, 2026
 
New
Year's
Day
New Year's Day: Showers and possibly a thunderstorm.  High near 63. Southwest wind around 5 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
High: 63 °F
Tonight

Tonight: A slight chance of showers before 10pm.  Mostly cloudy, with a low around 50. Calm wind.  Chance of precipitation is 20%.
Low: 50 °F
Friday

Friday: Partly sunny, with a high near 65. Calm wind becoming west around 5 mph in the afternoon.
High: 65 °F
Friday
Night
Friday Night: A slight chance of showers after 10pm.  Mostly cloudy, with a low around 53. Calm wind becoming northeast around 5 mph.  Chance of precipitation is 20%.
Low: 53 °F
Saturday

Saturday: A chance of showers, mainly after 10am.  Cloudy, with a high near 64. Southeast wind around 5 mph.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
High: 64 °F
Saturday
Night
Saturday Night: Showers likely, mainly before 4am.  Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Low: 53 °F
Sunday

Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 10am.  Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
High: 63 °F
Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 51.
Low: 51 °F
Monday

Monday: A chance of showers.  Mostly cloudy, with a high near 62.
High: 62 °F
Showers

Slight Chance
Showers then
Mostly Cloudy
Partly Sunny

Slight Chance
Showers
Chance
Showers
Showers
Likely
Showers
Likely
Showers
Likely
Chance
Showers

Flood Watch
Flood Advisory


New Year's Day
 
Showers and possibly a thunderstorm. High near 63. Southwest wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
A slight chance of showers before 10pm. Mostly cloudy, with a low around 50. Calm wind. Chance of precipitation is 20%.
Friday
 
Partly sunny, with a high near 65. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
A slight chance of showers after 10pm. Mostly cloudy, with a low around 53. Calm wind becoming northeast around 5 mph. Chance of precipitation is 20%.
Saturday
 
A chance of showers, mainly after 10am. Cloudy, with a high near 64. Southeast wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
 
Showers likely, mainly before 4am. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Sunday
 
A chance of showers, then showers likely and possibly a thunderstorm after 10am. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Sunday Night
 
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 51.
Monday
 
A chance of showers. Mostly cloudy, with a high near 62.
Monday Night
 
A chance of showers. Mostly cloudy, with a low around 49.
Tuesday
 
A chance of showers. Mostly cloudy, with a high near 63.
Tuesday Night
 
A chance of showers. Mostly cloudy, with a low around 47.
Wednesday
 
A chance of showers. Partly sunny, with a high near 61.

Forecast from NOAA-NWS for Fontana.



 


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