Grantsburg Weather Forecast

    • 66
    • 89

    Mostly Sunny

    • 72
    • 94

    Partly Sunny

    • 72
    • 97

    Rain Showers Likely

    • 64
    • 87

    Chance Thunderstorms

    • 66
    • 89

    Slight Chance Thunderstorms

    • 68
    • 92

    Mostly Sunny

Today 7 Sep Johnson

Sunny. Near steady temperature in the upper 80s. Northeast Winds around 5 Mph.

Tonight 7 Sep Johnson

Clear. Lows in the mid 60s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Grantsburg Temperature Statistics

September Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 1 September, 2026

    69.3 °F

  • Average September

    84 °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

    49.5 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    70.2 °F
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