Courtney Lake Weather Forecast

    • 42
    • 65

    Slight Chance Rain Showers

    • 42
    • 69

    Partly Sunny

    • 38
    • 63

    Mostly Cloudy

    • 35
    • 61

    Partly Sunny

    • 36
    • 64

    Mostly Sunny

    • 40
    • 66

    Partly Sunny

Today 18 Sep Ontonagon

Mostly cloudy. A slight chance of Showers in the afternoon. Highs in the mid 60s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 18 Sep Ontonagon

Partly cloudy with a 20 percent chance of rain Showers. Lows 42 to 47. Southeast Winds 5 to 10 Mph.

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Courtney Lake Temperature Statistics

September Temperature

Houghton County Memorial Airport (35.4 miles)

  • Lowest 14 September, 2026

    37 °F

  • Average September

    62.8 °F

  • Highest 1 September, 2026

    82 °F

Climate (2021–2026)

Houghton County Memorial Airport (35.4 miles)

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  • Average Low 2021–2026

    35.8 °F

  • Average 2021–2026

    44 °F

  • Average High 2021–2026

    51.9 °F
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