Thunder Bay National Marine Sanctuary Weather Forecast

    • 41
    • 43

    Slight Chance Rain Showers

    • 49
    • 52

    Partly Sunny

    • 45
    • 59

    Partly Sunny

    • 45
    • 53

    Partly Sunny

    • 45
    • 53

    Mostly Sunny

    • 45
    • 52

    Mostly Sunny

Today 24 May Alpena

Mostly cloudy. Isolated rain Showers Early, then scattered rain Showers in the afternoon. Highs in the lower 60s. Southeast Winds up to 10 Mph. Chance of Showers 50 percent.

Tonight 24 May Alpena

Mostly cloudy. Areas of fog. Lows in the upper 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Thunder Bay National Marine Sanctuary Temperature Statistics

May Temperature

Alpena, Alpena County Regional Airport (22.4 miles)

  • Lowest 12 May, 2026

    25.6 °F

  • Average May

    48.5 °F

  • Highest 18 May, 2026

    87.7 °F

Climate (2021–Present)

Alpena, Alpena County Regional Airport (22.4 miles)

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  • Average Low 2021–2026

    36.8 °F

  • Average 2021–2026

    46.6 °F

  • Average High 2021–2026

    56.2 °F
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