Grinnell Memorial Nature Sanctuary Weather Forecast

    • 40
    • 46

    Chance Rain Showers

    • 21
    • 45

    Rain Showers Likely

    • 22
    • 28

    Slight Chance Wintry Mix

    • 27
    • 34

    Partly Sunny

    • 26
    • 35

    Chance Snow Showers

    • 20
    • 32

    Chance Snow Showers

Today 14 Mar Keweenaw

A slight chance of Thunderstorms in the morning. Mostly cloudy with a slight chance of rain Showers. Warmer with Highs in the upper 40s. Southeast Winds 5 to 10 Mph, becoming east 5 to 15 Mph in the afternoon. Chance of rain 20 percent.

Tonight 14 Mar Keweenaw

Partly cloudy in the Evening, then mostly cloudy with a chance of rain Showers with a slight chance of Thunderstorms after midnight. Lows around 37 inland to around 43 at the shore. East Winds 5 to 15 Mph, becoming southeast 5 to 10 Mph with Gusts up to 30 Mph after midnight. Chance of rain 50 percent.

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Grinnell Memorial Nature Sanctuary Temperature Statistics

March Temperature

Copper Harbor (4.3 miles)

  • Lowest 8 March, 2025

    7 °F

  • Average March

    28.9 °F

  • Highest 9 March, 2025

    52 °F

Climate (2020–Present)

Copper Harbor (4.3 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    50.7 °F
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