National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Fontana-Arrow Highway (CQ057)

Lat: 34.10056°NLon: 117.49222°WElev: 1191.0ft.

NA

76°F

24°C

Humidity 44%
Wind Speed WSW 6 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Heat Index78°F (26°C)
Last update 02 Sep 08:00 PM PDT
Extended Forecast for

3 Miles SSW Rialto CA

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60. Southwest wind 5 to 10 mph becoming southeast after midnight.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm after midnight.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 11am. Partly sunny, with a high near 90. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 60. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 60. Southwest wind 5 to 10 mph becoming southeast after midnight.
Friday
Sunny, with a high near 87. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm after midnight.
Saturday
A slight chance of showers after 11am. Partly sunny, with a high near 90. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 20%.
Sunday
A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 86.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 69.
Labor Day
A slight chance of showers. Mostly sunny, with a high near 88.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 67.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 90.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 68.
Wednesday
Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Rialto CA
 34.08°N 117.4°W (Elev. 1125 ft)
Last Update:
12:01 pm PDT Sep 2, 2026
Forecast Valid:
9pm PDT Sep 2, 2026-6pm PDT Sep 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation