Thunder Bay National Marine Sanctuary Weather Forecast

    • 42
    • 49

    Partly Sunny

    • 45
    • 49

    Partly Sunny

    • 48
    • 50

    Partly Sunny

    • 48
    • 51

    Mostly Cloudy

    • 47
    • 50

    Partly Sunny

    • 46
    • 50

    Chance Rain Showers

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    Chance Rain Showers

Today 25 Oct Alpena

Mostly sunny. Highs in the lower 50s. Northeast Winds up to 10 Mph.

Tonight 25 Oct Alpena

Mostly clear. Patchy fog through the night. Lows in the upper 20s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Thunder Bay National Marine Sanctuary Temperature Statistics

October Temperature

Alpena, Alpena County Regional Airport (22.4 miles)

  • Lowest 9 October, 2025

    34 °F

  • Average October

    54.6 °F

  • Highest 4 October, 2025

    87.1 °F

Climate (2020–Present)

Alpena, Alpena County Regional Airport (22.4 miles)

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  • Average Low 2020–2025

    37.3 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    56.6 °F
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