Grantsburg Weather Forecast

    • 59
    • 80

    Increasing Clouds

    • 49
    • 77

    Sunny

    • 54
    • 75

    Mostly Sunny

    • 66
    • 84

    Chance Rain Showers

    • 69
    • 87

    Slight Chance Thunderstorms

    • 70
    • 89

    Chance Thunderstorms

Today 12 May Johnson

Sunny. Highs around 80. Southwest Winds 5 to 10 Mph.

Tonight 12 May Johnson

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 50s. Southwest Winds around 5 Mph.

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  • Temperature Real-Time

Grantsburg Temperature Statistics

May Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 2 May, 2026

    41 °F

  • Average May

    59.4 °F

  • Highest 4 May, 2026

    81.3 °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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