National Weather Service Forecast for: Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 2:11 am PDT Jun 2, 2025
 
This
Afternoon
This Afternoon: Sunny, with a high near 82. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny

 Tonight

Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 60. West wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Clear
then Patchy
Fog
 Tuesday

Tuesday: A slight chance of showers, with thunderstorms also possible after 11am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Slight Chance
T-storms and
Patchy Fog
 Tuesday
Night
Tuesday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Southwest wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight Chance
Showers
 Wednesday

Wednesday: A slight chance of showers before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 80. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Slight Chance
Showers then
Mostly Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 59.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 84.
Sunny

 Thursday
Night
Thursday Night: Clear, with a low around 60.
Clear

 Friday

Friday: Sunny, with a high near 86.
Sunny
Hi 82 °F Lo 60 °F Hi 83 °F Lo 59 °F Hi 80 °F Lo 59 °F Hi 84 °F Lo 60 °F Hi 86 °F

 

This Afternoon
 
 Sunny, with a high near 82. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
 
 Patchy fog after 2am. Otherwise, mostly clear, with a low around 60. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
 
 A slight chance of showers, with thunderstorms also possible after 11am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
 
 A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Southwest wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Wednesday
 
 A slight chance of showers before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 80. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Wednesday Night
 
 Mostly clear, with a low around 59.
Thursday
 
 Sunny, with a high near 84.
Thursday Night
 
 Clear, with a low around 60.
Friday
 
 Sunny, with a high near 86.
Friday Night
 
 Mostly clear, with a low around 61.
Saturday
 
 Sunny, with a high near 88.
Saturday Night
 
 Mostly clear, with a low around 62.
Sunday
 
 Sunny, with a high near 88.

 

Forecast from NOAA-NWS for Fontana CA.