Appleton Weather Forecast

    • 60
    • 83

    Chance Thunderstorms

    • 63
    • 83

    Chance Thunderstorms

    • 61
    • 80

    Chance Thunderstorms

    • 63
    • 82

    Chance Thunderstorms

    • 61
    • 80

    Chance Rain Showers

    • 58
    • 76

    Chance Rain Showers

Today 19 Sep Knox

Partly sunny. A chance of Showers with a slight chance of Thunderstorms this Morning, then a chance of Thunderstorms with a slight chance of Showers this afternoon. Highs in the lower 80s. Southeast Winds around 5 Mph, becoming southwest around 5 Mph this afternoon. Chance of rain 30 percent.

Tonight 19 Sep Knox

Partly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. Southwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 30 percent.

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Appleton Temperature Statistics

September Temperature

Galesburg Municipal Airport (13.7 miles)

  • Lowest 7 September, 2025

    39.6 °F

  • Average September

    65.9 °F

  • Highest 14 September, 2025

    95.2 °F

Climate (2020–Present)

Galesburg Municipal Airport (13.7 miles)

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  • Average Low 2020–2025

    41.2 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61.5 °F
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