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

71°F

22°C

Humidity 64%
Wind Speed S 0 MPH
Barometer NA
Dewpoint 58°F (14°C)
Visibility NA
Last update 12 Jul 02:00 AM PDT
Extended Forecast for

Rancho Cucamonga CA

  • Today

    Today: Sunny through mid morning, then becoming mostly cloudy, with a high near 93. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 93 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly clear, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 93. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. West wind 5 to 10 mph becoming light southwest in the evening.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 97. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 97 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 102.

    High: 102 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers after 11am. Mostly sunny, with a high near 98.

    High: 98 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny through mid morning, then becoming mostly cloudy, with a high near 93. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening.
Monday
Mostly sunny, with a high near 93. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 65. West wind 5 to 10 mph becoming light southwest in the evening.
Tuesday
Sunny, with a high near 97. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny, with a high near 102.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
A slight chance of showers after 11am. Mostly sunny, with a high near 98.
Thursday Night
Mostly clear, with a low around 68.
Friday
A slight chance of showers. Mostly sunny, with a high near 92.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.13°N 117.57°W (Elev. 1362 ft)
Last Update:
12:12 am PDT Jul 12, 2026
Forecast Valid:
5am PDT Jul 12, 2026-6pm PDT Jul 18, 2026
 
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Additional Resources

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Chance of Precipitation