Rancho Fontana Weather Forecast

    • 66
    • 92

    Mostly Sunny

    • 65
    • 91

    Mostly Sunny

    • 65
    • 91

    Sunny

    • 66
    • 93

    Mostly Sunny

    • 65
    • 92

    Mostly Sunny

    • 63
    • 85

    Mostly Sunny

Today 4 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs in the lower 90s. Light Winds becoming west 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 4 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows in the mid 60s. Areas of Winds west 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Rancho Fontana Temperature Statistics

October Temperature

Ontario International Airport (7.5 miles)

  • Lowest 1 October, 2022

    62.1 °F

  • Average October

    67.7 °F

  • Highest 1 October, 2022

    81 °F

Climate (2010–Present)

Ontario International Airport (7.5 miles)

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  • Average Low 2010–Present

    57 °F

  • Average 2010–Present

    67.4 °F

  • Average High 2010–Present

    80.5 °F
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