Thunder Bay National Marine Sanctuary Weather Forecast

    • 23
    • 25

    Snow Showers

    • 32
    • 37

    Windy

    • 32
    • 38

    Windy

    • 19
    • 41

    Windy

    • 21
    • 25

    Blustery

    • 25
    • 36

    Slight Chance Snow Showers

Today 15 Dec Alpena

Cloudy. Chance of snow Showers Early, then slight chance of snow Showers in the afternoon. Highs in the lower 20s. Southwest Winds 10 to 20 Mph with Gusts to around 35 Mph. Chance of snow 30 percent.

Tonight 15 Dec Alpena

Cloudy early then becoming partly cloudy. Lows around 15. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph early.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Thunder Bay National Marine Sanctuary Temperature Statistics

December Temperature

Alpena, Alpena County Regional Airport (22.4 miles)

  • Lowest 13 December, 2025

    1.9 °F

  • Average December

    20.7 °F

  • Highest 2 December, 2025

    32 °F

Climate (2020–Present)

Alpena, Alpena County Regional Airport (22.4 miles)

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  • Average Low 2020–2025

    37.1 °F

  • Average 2020–2025

    46.9 °F

  • Average High 2020–2025

    56.5 °F
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