Grantsburg Weather Forecast

    • 77
    • 92

    Mostly Sunny

    • 69
    • 96

    Chance Thunderstorms

    • 63
    • 83

    Mostly Sunny

    • 62
    • 80

    Partly Sunny

    • 66
    • 82

    Slight Chance Thunderstorms

    • 69
    • 87

    Mostly Sunny

    • 72
    • 92

    Mostly Sunny

Today 20 Jul Johnson

Mostly sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 90s. Calm Winds. Chance of rain 20 percent.

Tonight 20 Jul Johnson

Mostly clear this Evening, then becoming partly cloudy. Lows in the upper 70s. Calm Winds, becoming southwest around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grantsburg Temperature Statistics

July Temperature

Metropolis Municipal Airport (14.3 miles)

  • Lowest 9 July, 2026

    67.1 °F

  • Average July

    78.2 °F

  • Highest 3 July, 2026

    94.1 °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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