Rancho Fontana Weather Forecast

    • 63
    • 89

    Partly Sunny

    • 61
    • 85

    Increasing Clouds

    • 55
    • 78

    Mostly Cloudy

    • 49
    • 70

    Rain Showers

    • 44
    • 58

    Chance Rain Showers

    • 47
    • 64

    Mostly Sunny

    • 47
    • 66

    Partly Sunny

Today 10 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 87 to 93. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph.

Tonight 10 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Lows 55 to 59 in wind Sheltered Areas to 59 to 64 in warmer Locations. Areas of Winds east to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Fontana Temperature Statistics

November Temperature

Ontario International Airport (7.5 miles)

  • Lowest 2 November, 2025

    53.1 °F

  • Average November

    65.5 °F

  • Highest 8 November, 2025

    88 °F

Climate (2020–Present)

Ontario International Airport (7.5 miles)

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  • Average Low 2020–2025

    55.4 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    78.9 °F
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