Glenn Weather Forecast

    • 55
    • 75

    Cloudy

    • 53
    • 65

    Chance Rain Showers

    • 59
    • 69

    Mostly Cloudy

    • 53
    • 72

    Rain Showers Likely

    • 47
    • 68

    Chance Rain Showers

    • 45
    • 68

    Slight Chance Rain Showers

Today 31 Oct Jackson

Cloudy. Highs in the mid 70s. East Winds around 5 Mph.

Tonight 31 Oct Jackson

Cloudy. Showers likely after midnight. Lows in the mid 50s. Southeast Winds around 5 Mph. Chance of rain 60 percent.

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Glenn Temperature Statistics

October Temperature

Southern Illinois Airport (18 miles)

  • Lowest 18 October, 2026

    34.6 °F

  • Average October

    64.5 °F

  • Highest 1 October, 2026

    93.7 °F

Climate (2021–2026)

Southern Illinois Airport (18 miles)

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  • Average Low 2021–2026

    48.3 °F

  • Average 2021–2026

    59 °F

  • Average High 2021–2026

    69.6 °F
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