Mount Vernon Weather Forecast

    • 68
    • 91

    Thunderstorms Likely

    • 66
    • 84

    Rain Showers

    • 64
    • 82

    Rain Showers

    • 63
    • 83

    Chance Rain Showers

    • 66
    • 86

    Partly Sunny

    • 68
    • 87

    Rain Showers Likely

    • 65
    • 83

    Rain Showers Likely

Today 4 Jul Knox

Showers with Thunderstorms likely. Hot with Highs around 90. West Winds 5 to 10 Mph. Chance of rain 80 percent. Heat index Values up to 100.

Tonight 4 Jul Knox

Mostly cloudy with a slight chance of Thunderstorms. A slight chance of Showers this Evening, then a chance of Showers after midnight. Lows in the upper 60s. West Winds 5 to 10 Mph, becoming southeast after midnight. Chance of rain 50 percent.

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Mount Vernon Temperature Statistics

July Temperature

Knox County Airfield (4.3 miles)

  • Lowest 2 July, 2026

    71.6 °F

  • Average July

    82.3 °F

  • Highest 1 July, 2026

    93.2 °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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