Mount Vernon Weather Forecast

    • 60
    • 77

    Rain Showers Likely

    • 56
    • 77

    Chance Rain Showers

    • 58
    • 78

    Mostly Sunny

    • 58
    • 77

    Rain Showers Likely

    • 54
    • 74

    Slight Chance Thunderstorms

    • 56
    • 75

    Partly Sunny

Today 19 Aug Knox

Partly sunny in the Morning, then mostly cloudy with a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the upper 70s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 19 Aug Knox

Mostly clear. Near steady temperature in the lower 60s. Southwest Winds around 5 Mph.

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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

    72 °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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