Grantsburg Weather Forecast

    • 76
    • 94

    Mostly Sunny

    • 77
    • 96

    Slight Chance Thunderstorms

    • 75
    • 95

    Partly Sunny

    • 74
    • 95

    Mostly Sunny

    • 75
    • 97

    Mostly Sunny

    • 75
    • 99

    Hot

Today 11 Aug Johnson

Sunny, hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph.

Tonight 11 Aug Johnson

Mostly clear. Near steady temperature in the upper 70s. South Winds around 5 Mph.

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Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 5 August, 2026

    61.7 °F

  • Average August

    75.1 °F

  • Highest 7 August, 2026

    90.5 °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

    70.1 °F
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