Ontonagon Weather Forecast

    • 40
    • 57

    Mostly Sunny

    • 46
    • 68

    Chance Rain Showers

    • 45
    • 64

    Rain Showers Likely

    • 47
    • 69

    Partly Sunny

    • 51
    • 76

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

Today 21 May Ontonagon

Patchy frost this morning. Sunny, warmer with Highs in the mid 60s. South Winds 5 to 10 Mph, becoming southeast this afternoon.

Tonight 21 May Ontonagon

Mostly clear. Lows around 39. Southeast Winds 5 to 10 Mph, becoming south after midnight.

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Ontonagon Temperature Statistics

May Temperature

Houghton County Memorial Airport (44.1 miles)

  • Lowest 8 May, 2026

    28 °F

  • Average May

    45.9 °F

  • Highest 15 May, 2026

    82.9 °F

Climate (2021–Present)

Houghton County Memorial Airport (44.1 miles)

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  • Average Low 2021–2026

    35.9 °F

  • Average 2021–2026

    44.1 °F

  • Average High 2021–2026

    52.1 °F
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