Thunder Bay National Marine Sanctuary Weather Forecast

    • 38
    • 41

    Rain

    • 39
    • 41

    Chance Rain

    • 39
    • 43

    Mostly Sunny

    • 42
    • 45

    Mostly Sunny

    • 44
    • 48

    Partly Sunny

    • 43
    • 51

    Partly Sunny

Today 1 May Alpena

Rain. Patchy fog in the afternoon. Highs in the lower 40s. East Winds 5 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 1 May Alpena

Mostly cloudy with a 20 percent chance of rain. Lows in the lower 30s. Light Winds.

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Thunder Bay National Marine Sanctuary Temperature Statistics

May Temperature

Alpena, Alpena County Regional Airport (22.4 miles)

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  • Average May

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Climate (2020–Present)

Alpena, Alpena County Regional Airport (22.4 miles)

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  • Average Low 2020–2025

    37.2 °F

  • Average 2020–2025

    46.9 °F

  • Average High 2020–2025

    56.4 °F
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