Ontonagon Weather Forecast

    • 57
    • 73

    Mostly Cloudy

    • 54
    • 63

    Chance Rain Showers

    • 56
    • 68

    Chance Rain Showers

    • 58
    • 72

    Rain Showers Likely

    • 59
    • 73

    Chance Thunderstorms

    • 56
    • 76

    Chance Rain Showers

    • 54
    • 68

    Slight Chance Rain Showers

Today 17 Sep Ontonagon

Mostly sunny. Light north Winds.

Tonight 17 Sep Ontonagon

Partly cloudy this Evening, then mostly cloudy with a slight chance of Showers after midnight. Lows in the mid 50s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ontonagon Temperature Statistics

September Temperature

Houghton County Memorial Airport (44.1 miles)

  • Lowest 8 September, 2025

    42.1 °F

  • Average September

    58.3 °F

  • Highest 15 September, 2025

    80.1 °F

Climate (2020–Present)

Houghton County Memorial Airport (44.1 miles)

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  • Average Low 2020–2025

    35.9 °F

  • Average 2020–2025

    44.1 °F

  • Average High 2020–2025

    52.1 °F
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