Lake Upson Weather Forecast

    • 41
    • 57

    Rain Showers

    • 35
    • 47

    Rain Showers Likely

    • 39
    • 50

    Mostly Sunny

    • 43
    • 58

    Mostly Cloudy

    • 41
    • 58

    Mostly Cloudy

    • 43
    • 57

    Slight Chance Rain Showers

    • 45
    • 63

    Partly Sunny

Today 18 May Keweenaw

Cloudy. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 18 May Keweenaw

Rain Showers likely with a chance of Thunderstorms in the Evening, then rain Showers with a slight chance of Thunderstorms after midnight. Patchy fog. Lows around 40. Northeast Winds 5 to 15 Mph, becoming east after midnight. Chance of rain 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Upson Temperature Statistics

May Temperature

Copper Harbor (7.5 miles)

  • Lowest 8 May, 2026

    30 °F

  • Average May

    44 °F

  • Highest 15 May, 2026

    79 °F

Climate (2021–Present)

Copper Harbor (7.5 miles)

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  • Average Low 2021–2026

    38.4 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    50.8 °F
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