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Weather Forecast for Fontana

Now
Current Weather Conditions
53° F

Wind: 13.8 mph
Humidity: 54%
Clouds: 75%
Pressure: 1016 hPa
Sunrise: 10:31 AM ET
Sunset: 9:36 PM ET
Tomorrow
Tomorrow's Weather Conditions
Partly Cloudy
then Slight
Chance
Showers

Heavy Rain

Fri
Fri's Weather Conditions
Chance
Showers then
Slight Chance
Showers

Mostly Sunny



Extended Forecast
 
National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 2:38 am PST Feb 18, 2026
 
Today

Today: Mostly sunny, with a high near 53. Southwest wind around 15 mph, with gusts as high as 25 mph.
High: 53 °F
Tonight

Tonight: A slight chance of showers after 4am.  Partly cloudy, with a low around 41. Southwest wind around 5 mph becoming calm  after midnight.  Chance of precipitation is 10%.
Low: 41 °F
Thursday

Thursday: Showers, mainly between 10am and 4pm. The rain could be heavy at times.  High near 50. Southeast wind 5 to 10 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
High: 50 °F
Thursday
Night
Thursday Night: A chance of showers, mainly before 10pm.  Mostly cloudy, with a low around 38. Southwest wind 10 to 15 mph becoming light and variable. Winds could gust as high as 25 mph.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Low: 38 °F
Friday

Friday: Mostly sunny, with a high near 56. East wind around 5 mph becoming southwest in the afternoon.
High: 56 °F
Friday
Night
Friday Night: Mostly clear, with a low around 41.
Low: 41 °F
Saturday

Saturday: Mostly sunny, with a high near 65.
High: 65 °F
Saturday
Night
Saturday Night: Mostly cloudy, with a low around 47.
Low: 47 °F
Sunday

Sunday: Mostly sunny, with a high near 69.
High: 69 °F
Mostly Sunny

Partly Cloudy
then Slight
Chance
Showers
Heavy Rain

Chance
Showers then
Slight Chance
Showers
Mostly Sunny

Mostly Clear

Mostly Sunny

Mostly Cloudy

Mostly Sunny

Wind Advisory


Today
 
Mostly sunny, with a high near 53. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
 
A slight chance of showers after 4am. Partly cloudy, with a low around 41. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 10%.
Thursday
 
Showers, mainly between 10am and 4pm. The rain could be heavy at times. High near 50. Southeast wind 5 to 10 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
 
A chance of showers, mainly before 10pm. Mostly cloudy, with a low around 38. Southwest wind 10 to 15 mph becoming light and variable. Winds could gust as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday
 
Mostly sunny, with a high near 56. East wind around 5 mph becoming southwest in the afternoon.
Friday Night
 
Mostly clear, with a low around 41.
Saturday
 
Mostly sunny, with a high near 65.
Saturday Night
 
Mostly cloudy, with a low around 47.
Sunday
 
Mostly sunny, with a high near 69.
Sunday Night
 
Partly cloudy, with a low around 50.
Monday
 
A slight chance of showers. Partly sunny, with a high near 72.
Monday Night
 
A chance of showers. Mostly cloudy, with a low around 53.
Tuesday
 
A chance of showers. Partly sunny, with a high near 70.

Forecast from NOAA-NWS for Fontana.



 


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