Grantsburg Weather Forecast

    • 66
    • 88

    Increasing Clouds

    • 70
    • 88

    Rain Showers

    • 66
    • 84

    Chance Thunderstorms

    • 66
    • 82

    Chance Rain Showers

    • 68
    • 86

    Slight Chance Thunderstorms

    • 69
    • 88

    Chance Rain Showers

Today 30 Jul Johnson

Sunny. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 30 Jul Johnson

Partly cloudy. Lows in the mid 60s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Grantsburg Temperature Statistics

July Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 23 July, 2026

    60.8 °F

  • Average July

    78.2 °F

  • Highest 26 July, 2026

    94.8 °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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