Mount Vernon Weather Forecast

    • 61
    • 85

    Sunny

    • 61
    • 83

    Mostly Sunny

    • 57
    • 75

    Rain Showers

    • 53
    • 68

    Rain Showers Likely

    • 54
    • 70

    Mostly Sunny

    • 56
    • 76

    Mostly Sunny

Today 19 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 81 to 86. Light Winds becoming southwest 10 to 15 Mph in the afternoon.

Tonight 19 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 55 to 60. Areas of Winds southeast to 10 Mph in the evening becoming light.

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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

    74.2 °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

    63.3 °F

  • Average High 2021–2026

    80.4 °F
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