Muir Weather Forecast

    • 51
    • 78

    Mostly Sunny

    • 55
    • 79

    Partly Sunny

    • 68
    • 83

    Chance Rain Showers

    • 61
    • 83

    Partly Sunny

    • 52
    • 76

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

Today 6 Sep Ionia

Sunny. Highs in the upper 70s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 6 Sep Ionia

Mostly clear. Lows in the lower 50s. East Winds 5 to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Muir Temperature Statistics

September Temperature

Ionia County Airport (6.8 miles)

  • Lowest 4 September, 2026

    66.2 °F

  • Average September

    76.1 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

Ionia County Airport (6.8 miles)

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  • Average Low 2021–2026

    40.9 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    59 °F
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