Thunder Bay National Marine Sanctuary Weather Forecast

    • 24
    • 35

    Breezy

    • 29
    • 32

    Snow

    • 32
    • 34

    Cloudy

    • 25
    • 38

    Rain/Snow Likely

    • 20
    • 29

    Chance Snow

    • 20
    • 26

    Chance Snow

Today 25 Dec Alpena

Mostly cloudy. Highs in the lower 30s. Northeast Winds 5 to 15 Mph with Gusts to around 25 Mph.

Tonight 25 Dec Alpena

Mostly cloudy. Chance of snow Showers Early, then snow Showers likely after midnight. Total nighttime snow accumulation up to 1 inch. Lows around 18. Southeast Winds 5 to 15 Mph with Gusts to around 30 Mph. Chance of snow 60 percent.

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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 14 December, 2025

    1 °F

  • Average December

    22.9 °F

  • Highest 18 December, 2025

    44.1 °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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