Grand Tower Weather Forecast

    • 74
    • 93

    Mostly Sunny

    • 77
    • 98

    Mostly Sunny

    • 77
    • 98

    Hot

    • 74
    • 95

    Chance Thunderstorms

    • 72
    • 89

    Chance Thunderstorms

    • 71
    • 88

    Chance Rain Showers

Today 9 Aug Jackson

Patchy fog in the morning. Sunny. Highs in the lower 90s. South Winds 5 to 10 Mph.

Tonight 9 Aug Jackson

Mostly clear. Near steady temperature in the lower 70s. South Winds around 5 Mph.

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Grand Tower Temperature Statistics

August Temperature

Southern Illinois Airport (17.4 miles)

  • Lowest 5 August, 2026

    62.6 °F

  • Average August

    76.2 °F

  • Highest 5 August, 2026

    87.8 °F

Climate (2021–2026)

Southern Illinois Airport (17.4 miles)

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  • Average Low 2021–2026

    48.2 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.3 °F
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