Rosa Lake Weather Forecast

    • 55
    • 84

    Mostly Sunny

    • 53
    • 83

    Mostly Sunny

    • 53
    • 83

    Mostly Sunny

    • 55
    • 86

    Mostly Sunny

    • 56
    • 86

    Partly Sunny

    • 51
    • 79

    Chance Rain Showers

    • 50
    • 73

    Slight Chance Rain Showers

Today 14 Sep Montcalm

Sunny. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 14 Sep Montcalm

Mostly clear. Lows in the mid 50s. East Winds 5 to 10 Mph.

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Rosa Lake Temperature Statistics

September Temperature

Ionia County Airport (19.3 miles)

  • Lowest 8 September, 2025

    35.6 °F

  • Average September

    59.1 °F

  • Highest 12 September, 2025

    80.6 °F

Climate (2020–Present)

Ionia County Airport (19.3 miles)

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  • Average Low 2020–2025

    40.9 °F

  • Average 2020–2025

    49.9 °F

  • Average High 2020–2025

    58.9 °F
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