Grantsburg Weather Forecast

    • 60
    • 84

    Increasing Clouds

    • 62
    • 83

    Partly Sunny

    • 64
    • 85

    Mostly Sunny

    • 67
    • 88

    Slight Chance Thunderstorms

    • 65
    • 89

    Mostly Sunny

    • 65
    • 87

    Mostly Sunny

Today 23 Aug Johnson

Patchy fog this morning. Sunny. Highs in the lower 80s. North Winds around 5 Mph.

Tonight 23 Aug Johnson

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 60. North Winds around 5 Mph in the Evening, becoming light and variable.

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Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 5 August, 2026

    61.7 °F

  • Average August

    78.8 °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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