Grassy Lake Weather Forecast

    • 45
    • 72

    Becoming Sunny

    • 62
    • 81

    Partly Sunny

    • 46
    • 77

    Chance Rain Showers

    • 44
    • 69

    Rain Showers Likely

    • 52
    • 72

    Rain Showers Likely

    • 45
    • 70

    Mostly Cloudy

Today 10 Sep Northern Schoolcraft

Cooler, sunny. Highs around 71. Northwest Winds 5 to 10 Mph.

Tonight 10 Sep Northern Schoolcraft

Mostly clear. Lows around 46. Light north Winds, becoming south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grassy Lake Temperature Statistics

September Temperature

Munising - Munising Lakeshore Observation (13 miles)

  • Lowest 6 September, 2026

    48.9 °F

  • Average September

    65.2 °F

  • Highest 1 September, 2026

    89.1 °F

Climate (2021–2026)

Munising - Munising Lakeshore Observation (13 miles)

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  • Average Low 2021–2026

    36.8 °F

  • Average 2021–2026

    44.4 °F

  • Average High 2021–2026

    51.9 °F
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