Grantsburg Weather Forecast

    • 68
    • 89

    Chance Rain Showers

    • 64
    • 88

    Mostly Sunny

    • 62
    • 87

    Mostly Sunny

    • 65
    • 89

    Mostly Sunny

    • 70
    • 92

    Mostly Sunny

    • 72
    • 94

    Mostly Sunny

Today 26 Aug Johnson

Partly sunny. A chance of Showers and Thunderstorms this morning. Highs in the upper 80s. South Winds around 5 Mph. Chance of rain 40 percent.

Tonight 26 Aug Johnson

Mostly cloudy in the Evening, then clearing. A chance of Showers and Thunderstorms. Lows in the upper 60s. Southwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 24 August, 2026

    57.6 °F

  • Average August

    78.1 °F

  • Highest 16 August, 2026

    98.4 °F

Climate (2021–2026)

Metropolis Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    59.7 °F

  • Average High 2021–2026

    70.2 °F
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