Mount Vernon Weather Forecast

    • 57
    • 86

    Mostly Sunny

    • 54
    • 84

    Mostly Sunny

    • 54
    • 84

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 56
    • 87

    Partly Sunny

    • 56
    • 81

    Chance Rain Showers

Today 15 Sep Knox

Sunny. Highs in the mid 80s. Northeast Winds 5 to 10 Mph.

Tonight 15 Sep Knox

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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Mount Vernon Temperature Statistics

September Temperature

Knox County Airfield (4.3 miles)

  • Lowest 8 September, 2025

    41 °F

  • Average September

    62.4 °F

  • Highest 12 September, 2025

    82.4 °F

Climate (2020–Present)

Knox County Airfield (4.3 miles)

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  • Average Low 2020–2025

    43.3 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    61.5 °F
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