Thunder Bay National Marine Sanctuary Weather Forecast

    • 30
    • 32

    Wintry Mix

    • 33
    • 35

    Rain/Snow Likely

    • 28
    • 36

    Rain/Snow Likely

    • 26
    • 32

    Slight Chance Snow

    • 17
    • 30

    Slight Chance Snow

    • 9
    • 22

    Blustery

Today 18 Feb Alpena

Snow Showers and slight chance of freezing rain Early, then snow Showers, slight chance of rain Showers and light freezing rain in the afternoon. Patchy blowing snow through the day. Breezy. Snow may be heavy at Times early. Total daytime snow accumulation of 1 to 3 Inches. New ice accumulation of up to less than one quarter of an inch. Highs in the lower 30s. East Winds 10 to 25 Mph with Gusts to around 40 Mph.

Tonight 18 Feb Alpena

Mostly cloudy. Chance of snow Showers and slight chance of light freezing rain early. Lows in the upper 20s. East Winds 5 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 20 percent.

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Thunder Bay National Marine Sanctuary Temperature Statistics

February Temperature

Alpena, Alpena County Regional Airport (22.4 miles)

  • Lowest 8 February, 2026

    -13.5 °F

  • Average February

    18.5 °F

  • Highest 13 February, 2026

    39.9 °F

Climate (2021–Present)

Alpena, Alpena County Regional Airport (22.4 miles)

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  • Average Low 2021–2026

    37 °F

  • Average 2021–2026

    46.8 °F

  • Average High 2021–2026

    56.4 °F
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