Seneca Lake Weather Forecast

    • 50
    • 61

    Mostly Cloudy

    • 50
    • 61

    Mostly Cloudy

    • 54
    • 67

    Rain Showers Likely

    • 55
    • 71

    Chance Thunderstorms

    • 53
    • 74

    Chance Rain Showers

    • 51
    • 66

    Slight Chance Rain Showers

Today 18 Sep Keweenaw

Cooler. Partly cloudy. Highs around 59. Northeast Winds 5 to 15 Mph.

Tonight 18 Sep Keweenaw

Partly cloudy. Lows around 51. Light northeast Winds, becoming east 5 to 10 Mph after midnight.

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Seneca Lake Temperature Statistics

September Temperature

Houghton County Memorial Airport (11.2 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 (11.2 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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