Grimes Lake Weather Forecast

    • 57
    • 71

    Rain Showers Likely

    • 55
    • 72

    Rain Showers Likely

    • 52
    • 73

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 55
    • 82

    Slight Chance Thunderstorms

    • 50
    • 72

    Slight Chance Thunderstorms

Today 18 Aug Alger

A chance of Showers in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Mostly cloudy. Highs around 71. Southeast Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 18 Aug Alger

Showers likely. A chance of Thunderstorms in the Evening, then a slight chance of Thunderstorms after midnight. Lows around 59. Southeast Winds 5 to 10 Mph, becoming south after midnight. Chance of rain 70 percent.

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Grimes Lake Temperature Statistics

August Temperature

Munising - Munising Lakeshore Observation (9.3 miles)

  • Lowest 1 August, 2025

    46.7 °F

  • Average August

    71.5 °F

  • Highest 8 August, 2025

    92.6 °F

Climate (2020–Present)

Munising - Munising Lakeshore Observation (9.3 miles)

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  • Average Low 2020–2025

    36.9 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    52.2 °F
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