Lake Whittlesey Weather Forecast

    • 52
    • 60

    Mostly Cloudy

    • 53
    • 58

    Mostly Cloudy

    • 56
    • 61

    Chance Thunderstorms

    • 56
    • 65

    Chance Thunderstorms

    • 54
    • 66

    Slight Chance Rain Showers

    • 52
    • 62

    Partly Sunny

Today 18 Sep Keweenaw

Partly cloudy and cooler. Near steady temperature in the upper 50s. Northeast Winds 5 to 15 Mph.

Tonight 18 Sep Keweenaw

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 51. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Whittlesey Temperature Statistics

September Temperature

Copper Harbor (53.4 miles)

  • Lowest 4 September, 2025

    46.9 °F

  • Average September

    59.5 °F

  • Highest 15 September, 2025

    78.1 °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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