Grantsburg Weather Forecast

    • 45
    • 70

    Becoming Sunny

    • 48
    • 68

    Partly Sunny

    • 42
    • 64

    Mostly Cloudy

    • 40
    • 63

    Mostly Sunny

    • 49
    • 70

    Mostly Sunny

    • 51
    • 74

    Slight Chance Thunderstorms

Today 29 Apr Johnson

Partly sunny. Highs in the upper 60s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 29 Apr Johnson

Showers likely with a slight chance of Thunderstorms. Lows in the mid 50s. Northwest Winds 5 to 10 Mph. Chance of rain 70 percent.

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Grantsburg Temperature Statistics

April Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 6 April, 2026

    35.1 °F

  • Average April

    64.8 °F

  • Highest 17 April, 2026

    84.4 °F

Climate (2021–Present)

Metropolis Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    48.8 °F

  • Average 2021–2026

    59.1 °F

  • Average High 2021–2026

    69.5 °F
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