Grantsburg Weather Forecast

    • 70
    • 89

    Decreasing Clouds

    • 72
    • 91

    Mostly Sunny

    • 74
    • 93

    Mostly Sunny

    • 75
    • 94

    Chance Thunderstorms

    • 73
    • 92

    Chance Thunderstorms

    • 71
    • 90

    Chance Thunderstorms

Today 8 Aug Johnson

Mostly cloudy in the Morning, then partly sunny with a slight chance of Showers and Thunderstorms in the afternoon. Highs around 90. Southwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 8 Aug Johnson

Mostly cloudy. Near steady temperature in the lower 70s. Calm Winds.

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Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 5 August, 2026

    61.7 °F

  • Average August

    73.7 °F

  • Highest 5 August, 2026

    87.4 °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

    70.1 °F
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