Grantsburg Weather Forecast

    • 55
    • 80

    Mostly Cloudy

    • 55
    • 82

    Partly Sunny

    • 59
    • 86

    Mostly Sunny

    • 58
    • 86

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 61
    • 87

    Mostly Sunny

Today 27 Aug Johnson

Partly sunny. Near steady temperature in the upper 70s. Southwest Winds around 5 Mph.

Tonight 27 Aug Johnson

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 50s. Calm Winds.

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  • Temperature Real-Time

Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 3 August, 2025

    60.3 °F

  • Average August

    77.8 °F

  • Highest 19 August, 2025

    97.9 °F

Climate (2020–Present)

Metropolis Municipal Airport (14.3 miles)

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  • Average Low 2020–2025

    49.5 °F

  • Average 2020–2025

    59.6 °F

  • Average High 2020–2025

    70 °F
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