Mount Vernon Weather Forecast

    • 56
    • 78

    Increasing Clouds

    • 62
    • 80

    Chance Rain Showers

    • 61
    • 81

    Chance Thunderstorms

    • 57
    • 80

    Mostly Sunny

    • 59
    • 80

    Mostly Sunny

    • 65
    • 83

    Partly Sunny

Today 25 Aug Knox

Mostly sunny. Highs in the upper 70s. West Winds around 5 Mph.

Tonight 25 Aug Knox

Partly cloudy. Lows in the mid 50s. West Winds around 5 Mph, becoming southeast after midnight.

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Mount Vernon Temperature Statistics

August Temperature

Knox County Airfield (4.3 miles)

  • Lowest 4 August, 2026

    55.4 °F

  • Average August

    71.4 °F

  • Highest 5 August, 2026

    87.8 °F

Climate (2021–2026)

Knox County Airfield (4.3 miles)

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  • Average Low 2021–2026

    43.4 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    61.7 °F
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