Grantsburg Weather Forecast

    • 65
    • 76

    Rain Showers

    • 64
    • 83

    Chance Thunderstorms

    • 64
    • 83

    Chance Rain Showers

    • 62
    • 79

    Chance Rain Showers

    • 60
    • 79

    Chance Thunderstorms

    • 58
    • 78

    Mostly Sunny

Today 26 May Johnson

Showers likely. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the mid 70s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

Tonight 26 May Johnson

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Lows in the mid 60s. Northeast Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 40 percent.

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Grantsburg Temperature Statistics

May Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 2 May, 2026

    41 °F

  • Average May

    65 °F

  • Highest 18 May, 2026

    87.4 °F

Climate (2021–Present)

Metropolis Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    48.9 °F

  • Average 2021–2026

    59.2 °F

  • Average High 2021–2026

    69.6 °F
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