Grass Island Weather Forecast

    • 60
    • 70

    Chance Rain Showers

    • 63
    • 72

    Rain Showers

    • 58
    • 75

    Chance Rain Showers

    • 55
    • 74

    Partly Sunny

    • 57
    • 75

    Mostly Sunny

    • 61
    • 78

    Slight Chance Thunderstorms

Today 16 Aug Mille Lacs

Mostly cloudy. A 50 percent chance of Thunderstorms in the morning. Highs in the upper 70s. Northeast Winds up to 10 Mph.

Tonight 16 Aug Mille Lacs

Partly cloudy. Slight chance of Thunderstorms in the Evening, then chance of Thunderstorms after midnight. Lows in the upper 50s. Northeast Winds 5 to 10 Mph with Gusts to around 25 Mph. Chance of Thunderstorms 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Island Temperature Statistics

August Temperature

Brainerd - Crow Wing County Airport (23.6 miles)

  • Lowest 1 August, 2025

    47.6 °F

  • Average August

    70.2 °F

  • Highest 7 August, 2025

    87.7 °F

Climate (2020–Present)

Brainerd - Crow Wing County Airport (23.6 miles)

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  • Average Low 2020–2025

    34.4 °F

  • Average 2020–2025

    44.5 °F

  • Average High 2020–2025

    54.5 °F
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