Lake Whittlesey Weather Forecast

    • 55
    • 65

    Mostly Cloudy

    • 55
    • 63

    Mostly Cloudy

    • 57
    • 66

    Partly Sunny

    • 58
    • 70

    Mostly Cloudy

    • 55
    • 68

    Chance Rain Showers

    • 50
    • 64

    Chance Rain Showers

Today 13 Sep Keweenaw

Mostly cloudy in the Morning, then becoming mostly sunny. Patchy fog in the morning. Highs around 70. Light northeast Winds, becoming east 5 to 10 Mph in the afternoon.

Tonight 13 Sep Keweenaw

Mostly cloudy. Lows around 54. Light east Winds.

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Lake Whittlesey Temperature Statistics

September Temperature

Copper Harbor (53.4 miles)

  • Lowest 4 September, 2025

    46.9 °F

  • Average September

    58 °F

  • Highest 1 September, 2025

    75.9 °F

Climate (2020–Present)

Copper Harbor (53.4 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    50.9 °F
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