Grantsburg Weather Forecast

    • 56
    • 74

    Mostly Cloudy

    • 50
    • 76

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 63
    • 79

    Partly Sunny

    • 66
    • 81

    Chance Rain Showers

    • 64
    • 79

    Chance Rain Showers

Today 26 Sep Johnson

Partly sunny. Highs in the lower 70s. Northeast Winds around 5 Mph.

Tonight 26 Sep Johnson

Mostly cloudy. Lows in the upper 50s. Calm Winds.

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Grantsburg Temperature Statistics

September Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 8 September, 2026

    60.8 °F

  • Average September

    79.2 °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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