Mount Vernon Weather Forecast

    • 49
    • 76

    Chance Rain Showers

    • 45
    • 76

    Sunny

    • 49
    • 79

    Mostly Sunny

    • 58
    • 86

    Mostly Sunny

    • 59
    • 90

    Sunny

    • 60
    • 92

    Mostly Sunny

Today 6 Sep Posey

Mostly cloudy with a chance of Showers this Morning, then sunny this afternoon. Highs in the mid 70s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

Tonight 6 Sep Posey

Mostly clear. Lows in the upper 40s. Northwest Winds around 5 Mph, becoming west after midnight.

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Mount Vernon Temperature Statistics

September Temperature

Henderson City (13.7 miles)

  • Lowest 3 September, 2025

    55.9 °F

  • Average September

    71.6 °F

  • Highest 3 September, 2025

    88 °F

Climate (2020–Present)

Henderson City (13.7 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    67.6 °F
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