Grass Lake Weather Forecast

    • 55
    • 80

    Becoming Sunny

    • 52
    • 82

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 52
    • 77

    Partly Sunny

    • 45
    • 70

    Slight Chance Thunderstorms

    • 51
    • 71

    Mostly Cloudy

Today 15 Sep Kalkaska

Mostly sunny. Highs in the lower 80s. Southeast Winds up to 10 Mph.

Tonight 15 Sep Kalkaska

Mostly clear. Patchy fog after midnight. Lows in the mid 50s. Light Winds.

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  • Temperature Real-Time

Grass Lake Temperature Statistics

September Temperature

Grayling, Grayling Army Airfield (14.3 miles)

  • Lowest 8 September, 2025

    31.5 °F

  • Average September

    54.6 °F

  • Highest 12 September, 2025

    78.8 °F

Climate (2020–Present)

Grayling, Grayling Army Airfield (14.3 miles)

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  • Average Low 2020–2025

    34.9 °F

  • Average 2020–2025

    45.8 °F

  • Average High 2020–2025

    55.3 °F
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