Grantsburg Weather Forecast

    • 78
    • 97

    Hot

    • 70
    • 95

    Mostly Sunny

    • 67
    • 89

    Mostly Sunny

    • 68
    • 89

    Partly Sunny

    • 69
    • 88

    Chance Rain Showers

    • 68
    • 85

    Chance Rain Showers

Today 27 Jul Johnson

Mostly sunny. Hot with Highs in the upper 90s. South Winds 5 to 10 Mph. Highest heat index Readings heat index Readings up to 111 in the afternoon.

Tonight 27 Jul Johnson

Mostly clear. Lows in the upper 70s. Southwest Winds 5 to 10 Mph.

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Grantsburg Temperature Statistics

July Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 23 July, 2026

    60.8 °F

  • Average July

    77.9 °F

  • Highest 21 July, 2026

    94.5 °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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