Gilson Weather Forecast

    • 20
    • 43

    Becoming Sunny

    • 24
    • 35

    Mostly Sunny

    • 35
    • 44

    Mostly Cloudy

    • 34
    • 50

    Mostly Cloudy

    • 49
    • 56

    Mostly Cloudy

    • 41
    • 63

    Partly Sunny

Today 20 Dec Knox

Partly sunny. Not as cool with Highs in the lower 40s. Temperature falling into the mid 30s this afternoon. Southwest Winds 10 to 15 Mph, becoming northwest this afternoon.

Tonight 20 Dec Knox

Mostly clear. Lows around 20. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Gilson Temperature Statistics

December Temperature

Galesburg Municipal Airport (13 miles)

  • Lowest 14 December, 2025

    -12.5 °F

  • Average December

    21.7 °F

  • Highest 18 December, 2025

    43.5 °F

Climate (2020–Present)

Galesburg Municipal Airport (13 miles)

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  • Average Low 2020–2025

    41.3 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    61.7 °F
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