Grantsburg Weather Forecast

    • 67
    • 86

    Chance Thunderstorms

    • 66
    • 88

    Partly Sunny

    • 64
    • 88

    Mostly Sunny

    • 62
    • 84

    Partly Sunny

    • 63
    • 83

    Slight Chance Thunderstorms

    • 65
    • 87

    Slight Chance Thunderstorms

Today 20 Aug Johnson

Mostly cloudy this Morning, then becoming mostly sunny. Highs in the mid 80s. West Winds around 5 Mph, becoming north around 5 Mph this afternoon.

Tonight 20 Aug Johnson

Mostly clear. Lows in the upper 60s. North Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 5 August, 2026

    61.7 °F

  • Average August

    79.5 °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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