Mount Vernon Weather Forecast

    • 56
    • 76

    Partly Sunny

    • 65
    • 80

    Rain Showers Likely

    • 58
    • 79

    Rain Showers

    • 55
    • 69

    Rain Showers Likely

    • 56
    • 69

    Chance Rain Showers

    • 54
    • 68

    Chance Rain Showers

    • 53
    • 68

    Mostly Cloudy

Today 18 Sep Knox

Partly cloudy. Near steady temperature in the mid 70s. North Winds 5 to 10 Mph.

Tonight 18 Sep Knox

Mostly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Vernon Temperature Statistics

September Temperature

Knox County Airfield (4.3 miles)

  • Lowest 14 September, 2026

    51.8 °F

  • Average September

    72.2 °F

  • Highest 2 September, 2026

    91.4 °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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