Hart Lake Weather Forecast

    • 48
    • 64

    Mostly Cloudy

    • 46
    • 65

    Mostly Cloudy

    • 44
    • 67

    Partly Sunny

    • 42
    • 68

    Partly Sunny

    • 44
    • 68

    Partly Sunny

Today 22 Sep Eaton

Mostly sunny in the morning then becoming partly sunny. A 20 percent chance of rain Showers. Highs in the lower 70s.

Tonight 22 Sep Eaton

Partly cloudy. Lows in the upper 40s. Northeast Winds 10 to 15 Mph with Gusts to around 25 Mph.

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Hart Lake Temperature Statistics

September Temperature

Ionia County Airport (13.7 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    66.9 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

Ionia County Airport (13.7 miles)

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  • Average Low 2021–2026

    40.9 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    59 °F
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