Grantsburg Weather Forecast

    • 67
    • 93

    Decreasing Clouds

    • 70
    • 89

    Mostly Sunny

    • 73
    • 97

    Hot

    • 72
    • 96

    Mostly Sunny

    • 70
    • 95

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 67
    • 92

    Partly Sunny

Today 13 Sep Johnson

Mostly sunny. Near steady temperature around 90. Northwest Winds around 5 Mph.

Tonight 13 Sep Johnson

Partly cloudy. Lows in the upper 60s. Northeast 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

    81.1 °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

    70.2 °F
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