Gilson Weather Forecast

    • 66
    • 91

    Slight Chance Thunderstorms

    • 61
    • 85

    Chance Thunderstorms

    • 63
    • 85

    Chance Rain Showers

    • 63
    • 80

    Rain Showers Likely

    • 61
    • 80

    Chance Rain Showers

    • 56
    • 79

    Chance Rain Showers

Today 18 Sep Knox

Sunny with a slight chance of Showers and Thunderstorms. Highs around 90. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 18 Sep Knox

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. North Winds around 5 Mph. Chance of rain 50 percent.

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Gilson Temperature Statistics

September Temperature

Galesburg Municipal Airport (13 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 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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