Grantsburg Weather Forecast

    • 57
    • 73

    Decreasing Clouds

    • 58
    • 81

    Partly Sunny

    • 53
    • 81

    Mostly Sunny

    • 55
    • 81

    Partly Sunny

    • 56
    • 82

    Partly Sunny

    • 61
    • 86

    Partly Sunny

Today 23 Sep Johnson

Mostly cloudy. Highs in the lower 70s. North Winds 5 to 10 Mph.

Tonight 23 Sep Johnson

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 50s. North Winds 5 to 10 Mph.

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Grantsburg Temperature Statistics

September Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 8 September, 2026

    60.8 °F

  • Average September

    80.5 °F

  • Highest 5 September, 2026

    101.3 °F

Climate (2021–2026)

Metropolis Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    49.6 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    70.3 °F
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