Grantsburg Weather Forecast

    • 69
    • 90

    Increasing Clouds

    • 72
    • 89

    Chance Thunderstorms

    • 70
    • 91

    Chance Thunderstorms

    • 71
    • 89

    Partly Sunny

    • 73
    • 91

    Mostly Sunny

    • 74
    • 93

    Mostly Sunny

Today 5 Aug Johnson

Patchy fog in the morning. Sunny. Highs in the upper 80s. South Winds around 5 Mph.

Tonight 5 Aug Johnson

Mostly clear. Near steady temperature in the mid 60s. Calm Winds.

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Grantsburg Temperature Statistics

August Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 2 August, 2026

    68.5 °F

  • Average August

    72.4 °F

  • Highest 2 August, 2026

    77.5 °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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