Grand Tower Weather Forecast

    • 26
    • 42

    Mostly Cloudy

    • 9
    • 35

    Mostly Cloudy

    • 8
    • 18

    Sunny

    • 23
    • 35

    Mostly Sunny

    • 36
    • 47

    Mostly Cloudy

    • 47
    • 55

    Chance Rain Showers

    • 35
    • 59

    Slight Chance Rain Showers

Today 12 Dec Jackson

Mostly cloudy. Near steady temperature in the upper 30s. North Winds 5 to 10 Mph.

Tonight 12 Dec Jackson

Mostly cloudy. Lows in the mid 20s. North Winds around 5 Mph.

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Grand Tower Temperature Statistics

December Temperature

Southern Illinois Airport (17.4 miles)

  • Lowest 4 December, 2025

    19.9 °F

  • Average December

    32.2 °F

  • Highest 6 December, 2025

    48.9 °F

Climate (2020–Present)

Southern Illinois Airport (17.4 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.7 °F
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