Indiana Dunes National Lakeshore Weather Forecast

    • 57
    • 63

    Cloudy

    • 55
    • 62

    Mostly Cloudy

    • 53
    • 67

    Mostly Cloudy

    • 52
    • 65

    Partly Sunny

    • 53
    • 65

    Mostly Cloudy

    • 56
    • 67

    Partly Sunny

    • 58
    • 69

    Mostly Sunny

Today 22 Sep Porter

Mostly cloudy. Highs in the mid 70s.

Tonight 22 Sep Porter

Cloudy. A slight chance of Showers after midnight. A chance of Showers late. Lows in the mid 50s. Northeast Winds 5 to 10 Mph. Chance of precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Indiana Dunes National Lakeshore Temperature Statistics

September Temperature

Michigan City Municipal Airport (11.8 miles)

  • Lowest 14 September, 2026

    46.4 °F

  • Average September

    70.4 °F

  • Highest 2 September, 2026

    91.4 °F

Climate (2021–2026)

Michigan City Municipal Airport (11.8 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    59.3 °F
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