Indiana Dunes National Lakeshore Weather Forecast

    • 27
    • 30

    Increasing Clouds

    • 39
    • 42

    Mostly Cloudy

    • 33
    • 45

    Mostly Cloudy

    • 45
    • 45

    Rain Likely

    • 40
    • 55

    Chance Drizzle

    • 36
    • 47

    Mostly Cloudy

Today 21 Dec Porter

Sunny. Highs in the lower 30s. Northwest Winds 10 to 15 Mph, becoming southwest around 5 Mph in the afternoon.

Tonight 21 Dec Porter

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the lower 20s. South Winds 5 to 10 Mph.

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  • Temperature Real-Time

Indiana Dunes National Lakeshore Temperature Statistics

December Temperature

Michigan City Municipal Airport (11.8 miles)

  • Lowest 14 December, 2025

    5 °F

  • Average December

    27.4 °F

  • Highest 18 December, 2025

    50 °F

Climate (2020–Present)

Michigan City Municipal Airport (11.8 miles)

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  • Average Low 2020–2025

    42.1 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.2 °F
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