Mount Vernon Weather Forecast

    • 50
    • 71

    Becoming Sunny

    • 57
    • 80

    Sunny

    • 62
    • 83

    Sunny

    • 62
    • 85

    Sunny

    • 61
    • 85

    Sunny

    • 61
    • 86

    Sunny

Today 13 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the morning. Becoming mostly sunny. Highs 67 to 72. Light Winds.

Tonight 13 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 46 to 50. Areas of Winds northeast to 10 Mph.

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Mount Vernon Temperature Statistics

October Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 1 October, 2026

    60.8 °F

  • Average October

    79.7 °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

    63.3 °F

  • Average High 2021–2026

    80.4 °F
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