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

75°F

24°C

Humidity 26%
Wind Speed SW 3 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 06 Apr 01:00 PM PDT
Extended Forecast for

Rancho Cucamonga CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. Southwest wind 5 to 10 mph becoming light west in the evening. Winds could gust as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Light southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Southwest wind 5 to 10 mph becoming light west in the evening.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 57.

    Low: 57 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers after 11am. Mostly sunny, with a high near 74.

    High: 74 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 80. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 56. Southwest wind 5 to 10 mph becoming light west in the evening. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 81. Light southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 57. Southwest wind 5 to 10 mph becoming light west in the evening.
Wednesday
Sunny, with a high near 81. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 57.
Thursday
Partly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 55.
Friday
A slight chance of showers after 11am. Mostly sunny, with a high near 74.
Friday Night
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 54.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 66.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 52.
Sunday
A slight chance of showers. Partly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.13°N 117.57°W (Elev. 1362 ft)
Last Update:
12:14 pm PDT Apr 6, 2026
Forecast Valid:
2pm PDT Apr 6, 2026-6pm PDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation