Ontonagon County Park Weather Forecast

    • 60
    • 78

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

    • 61
    • 84

    Slight Chance Thunderstorms

    • 56
    • 79

    Chance Thunderstorms

    • 51
    • 70

    Chance Thunderstorms

    • 49
    • 67

    Chance Rain Showers

    • 49
    • 66

    Slight Chance Rain Showers

Today 14 Sep Ontonagon

Sunny. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 14 Sep Ontonagon

Clear. Patchy fog after midnight. Lows around 60. Light southeast Winds, becoming south after midnight.

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Ontonagon County Park Temperature Statistics

September Temperature

Ironwood, Gogebic-Iron County Airport (24.2 miles)

  • Lowest 8 September, 2025

    37 °F

  • Average September

    54.4 °F

  • Highest 1 September, 2025

    75.9 °F

Climate (2020–Present)

Ironwood, Gogebic-Iron County Airport (24.2 miles)

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  • Average Low 2020–2025

    32.7 °F

  • Average 2020–2025

    42.5 °F

  • Average High 2020–2025

    51.3 °F
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