De Soto Weather Forecast

    • 45
    • 73

    Mostly Sunny

    • 44
    • 73

    Mostly Sunny

    • 47
    • 75

    Sunny

    • 47
    • 73

    Mostly Sunny

    • 50
    • 74

    Partly Sunny

    • 51
    • 75

    Mostly Cloudy

Today 20 Oct Jackson

Sunny. Highs in the lower 70s. Calm Winds, becoming northeast around 5 Mph in the afternoon.

Tonight 20 Oct Jackson

Mostly clear. Lows in the mid 40s. Calm Winds.

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De Soto Temperature Statistics

October Temperature

Southern Illinois Airport (2.5 miles)

  • Lowest 17 October, 2026

    39.9 °F

  • Average October

    67.8 °F

  • Highest 1 October, 2026

    93.7 °F

Climate (2021–2026)

Southern Illinois Airport (2.5 miles)

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  • Average Low 2021–2026

    48.3 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    69.5 °F
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