Half Moon Lake Weather Forecast

    • 50
    • 73

    Partly Sunny

    • 53
    • 73

    Rain Showers Likely

    • 55
    • 64

    Rain Showers

    • 51
    • 66

    Chance Rain Showers

    • 50
    • 63

    Chance Rain Showers

    • 53
    • 66

    Chance Rain Showers

Today 17 Sep Montcalm

Mostly cloudy. A 30 percent chance of rain Showers in the morning. Highs in the lower 70s. Northeast Winds around 5 Mph.

Tonight 17 Sep Montcalm

Partly cloudy. Lows in the upper 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Half Moon Lake Temperature Statistics

September Temperature

Alma, Gratiot Community Airport (19.3 miles)

  • Lowest 14 September, 2026

    41 °F

  • Average September

    67.7 °F

  • Highest 1 September, 2026

    89.6 °F

Climate (2021–2026)

Alma, Gratiot Community Airport (19.3 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    49.1 °F

  • Average High 2021–2026

    58.6 °F
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