Rancho Fontana Weather Forecast

    • 50
    • 70

    Mostly Sunny

    • 51
    • 76

    Breezy

    • 52
    • 78

    Mostly Sunny

    • 50
    • 75

    Mostly Sunny

    • 46
    • 69

    Mostly Sunny

    • 44
    • 63

    Partly Sunny

Today 24 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming sunny. Highs 69 to 73. Light Winds becoming west to 10 Mph this afternoon.

Tonight 24 Nov San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows around 46 in wind Sheltered Areas to 47 to 52 in warmer Locations. Areas of Winds north to 10 Mph becoming east overnight.

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Rancho Fontana Temperature Statistics

November Temperature

Ontario International Airport (7.5 miles)

  • Lowest 19 November, 2025

    45 °F

  • Average November

    62.8 °F

  • Highest 10 November, 2025

    93 °F

Climate (2020–Present)

Ontario International Airport (7.5 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    78.9 °F
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