Lake John Weather Forecast

    • 18
    • 33

    Mostly Cloudy

    • 2
    • 20

    Partly Sunny

    • 19
    • 23

    Snow

    • 12
    • 31

    Chance Snow Showers

    • 5
    • 17

    Mostly Cloudy

    • 8
    • 15

    Mostly Cloudy

    • 9
    • 20

    Mostly Cloudy

Today 30 Jan Keweenaw

Mostly sunny. Northwest Winds 5 to 10 Mph.

Tonight 30 Jan Keweenaw

Mostly cloudy. Lows in the lower 20s. North Winds 5 to 10 Mph.

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Lake John Temperature Statistics

January Temperature

Copper Harbor (52.2 miles)

  • Lowest 21 January, 2025

    -5.2 °F

  • Average January

    19.5 °F

  • Highest 17 January, 2025

    41.6 °F

Climate (2020–Present)

Copper Harbor (52.2 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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