Ontonagon Weather Forecast

    • 51
    • 68

    Partly Sunny

    • 50
    • 72

    Partly Sunny

    • 53
    • 67

    Mostly Cloudy

    • 57
    • 67

    Mostly Cloudy

    • 56
    • 67

    Rain Showers Likely

    • 52
    • 62

    Chance Rain Showers

Today 25 Sep Ontonagon

Mostly sunny. Highs around 75 inland to around 69 at the shore. Light south Winds, becoming north in the afternoon.

Tonight 25 Sep Ontonagon

Clear. Lows 47 to 52. Light southeast Winds, becoming south after midnight.

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Ontonagon Temperature Statistics

September Temperature

Houghton County Memorial Airport (44.1 miles)

  • Lowest 22 September, 2026

    36 °F

  • Average September

    60 °F

  • Highest 1 September, 2026

    82 °F

Climate (2021–2026)

Houghton County Memorial Airport (44.1 miles)

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  • Average Low 2021–2026

    35.8 °F

  • Average 2021–2026

    43.9 °F

  • Average High 2021–2026

    51.9 °F
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