Mount Vernon Weather Forecast

    • 56
    • 70

    Rain Showers

    • 54
    • 67

    Rain Showers Likely

    • 56
    • 74

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 54
    • 74

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

Today 31 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly cloudy this morning. Becoming cloudy. Highs 67 to 72. Light Winds becoming southwest to 10 Mph this afternoon.

Tonight 31 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Showers. Lows 52 to 57. Light Winds.

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Mount Vernon Temperature Statistics

October Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 14 October, 2026

    48.9 °F

  • Average October

    70.2 °F

  • Highest 2 October, 2026

    104 °F

Climate (2021–2026)

San Bernardino Intl. Airport (4.3 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    63.4 °F

  • Average High 2021–2026

    80.4 °F
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