Glenn Weather Forecast

    • 36
    • 55

    Increasing Clouds

    • 46
    • 54

    Rain

    • 33
    • 57

    Mostly Cloudy

    • 39
    • 52

    Mostly Cloudy

    • 41
    • 62

    Partly Sunny

    • 34
    • 54

    Partly Sunny

Today 29 Jan Jackson

Sunny. Near steady temperature in the lower 50s. Northwest Winds around 5 Mph.

Tonight 29 Jan Jackson

Mostly clear in the Evening, then mostly cloudy with a slight chance of rain after midnight. Lows in the mid 30s. Calm Winds, becoming southeast around 5 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glenn Temperature Statistics

January Temperature

Southern Illinois Airport (18 miles)

  • Lowest 15 January, 2025

    6.9 °F

  • Average January

    27.4 °F

  • Highest 17 January, 2025

    52.6 °F

Climate (2020–Present)

Southern Illinois Airport (18 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.3 °F
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