Irwin Lake Weather Forecast

    • 61
    • 72

    Rain Showers Likely

    • 56
    • 74

    Chance Rain Showers

    • 52
    • 74

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

    • 55
    • 82

    Slight Chance Thunderstorms

    • 50
    • 73

    Slight Chance Thunderstorms

Today 18 Aug Alger

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms in the afternoon. Highs in the lower 70s. South Winds 10 to 15 Mph, becoming southeast in the afternoon. Chance of rain 50 percent.

Tonight 18 Aug Alger

Cloudy with a chance of Showers. A chance of Thunderstorms in the Evening, then a slight chance of Thunderstorms after midnight. Lows around 61. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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Irwin Lake Temperature Statistics

August Temperature

Munising - Munising Lakeshore Observation (13 miles)

  • Lowest 1 August, 2025

    46.7 °F

  • Average August

    71.5 °F

  • Highest 8 August, 2025

    92.6 °F

Climate (2020–Present)

Munising - Munising Lakeshore Observation (13 miles)

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  • Average Low 2020–2025

    36.9 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    52.2 °F
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