Southern Illinois Airport Weather Forecast

    • 56
    • 81

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

    • 62
    • 80

    Chance Thunderstorms

    • 51
    • 81

    Rain Showers Likely

    • 43
    • 65

    Mostly Sunny

    • 50
    • 71

    Mostly Sunny

    • 47
    • 74

    Mostly Sunny

Today 15 Oct Jackson

Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 15 Oct Jackson

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph.

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Southern Illinois Airport Temperature Statistics

October Temperature

Southern Illinois Airport (0 miles)

  • Lowest 10 October, 2025

    41 °F

  • Average October

    66.1 °F

  • Highest 1 October, 2025

    87.8 °F

Climate (2020–Present)

Southern Illinois Airport (0 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.8 °F
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