Mount Vernon Weather Forecast

    • 65
    • 83

    Chance Rain Showers

    • 62
    • 81

    Rain Showers Likely

    • 67
    • 83

    Chance Thunderstorms

    • 67
    • 87

    Rain Showers Likely

    • 58
    • 79

    Slight Chance Thunderstorms

    • 59
    • 79

    Mostly Sunny

Today 13 Aug Knox

Mostly cloudy this Morning, then becoming partly sunny. Patchy fog this morning. Highs in the lower 80s. West Winds around 5 Mph.

Tonight 13 Aug Knox

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Humid with Lows in the mid 60s. Northeast Winds around 5 Mph. Chance of rain 40 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

    72.4 °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