Sumner Lake Weather Forecast

    • 33
    • 39

    Mostly Cloudy

    • 34
    • 40

    Mostly Cloudy

    • 35
    • 43

    Partly Sunny

    • 34
    • 43

    Partly Sunny

    • 34
    • 41

    Partly Sunny

    • 35
    • 41

    Partly Sunny

Today 6 May Keweenaw

Cool. A chance of Sprinkles in the afternoon. Partly cloudy. Highs around 41. Northwest Winds 5 to 15 Mph, becoming west in the afternoon.

Tonight 6 May Keweenaw

Mostly clear. A chance of Sprinkles and Flurries late this evening. Near steady temperature in the mid 30s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Sumner Lake Temperature Statistics

May Temperature

Copper Harbor (53.4 miles)

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  • Average May

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Climate (2021–Present)

Copper Harbor (53.4 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    50.8 °F
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