Mount Vernon Weather Forecast

    • 56
    • 78

    Thunderstorms

    • 51
    • 72

    Chance Rain Showers

    • 52
    • 71

    Mostly Sunny

    • 55
    • 75

    Partly Sunny

    • 60
    • 78

    Partly Sunny

    • 61
    • 80

    Chance Thunderstorms

Today 22 Aug Knox

Partly cloudy this Morning, then mostly cloudy with Showers and Thunderstorms likely this afternoon. Highs in the upper 70s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 22 Aug Knox

Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the upper 50s. West Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain near 100 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Vernon Temperature Statistics

August Temperature

Knox County Airfield (4.3 miles)

  • Lowest 4 August, 2026

    55.4 °F

  • Average August

    71.9 °F

  • Highest 5 August, 2026

    87.8 °F

Climate (2021–2026)

Knox County Airfield (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    43.4 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    61.7 °F
Get WillyWeather+ to remove ads