Mount Vernon Weather Forecast

    • 66
    • 95

    Increasing Clouds

    • 62
    • 85

    Rain Showers

    • 52
    • 73

    Rain Showers

    • 49
    • 65

    Rain Showers

    • 50
    • 70

    Slight Chance Rain Showers

    • 55
    • 78

    Sunny

    • 59
    • 83

    Sunny

Today 9 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 84 to 91.

Tonight 9 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Clear this evening. Becoming cloudy. Lows 61 to 65. Areas of Winds west to 10 Mph this evening becoming light.

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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

    81.3 °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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