Indiana Dunes National Lakeshore Weather Forecast

    • 60
    • 75

    Mostly Sunny

    • 62
    • 76

    Mostly Sunny

    • 63
    • 79

    Mostly Sunny

    • 65
    • 80

    Slight Chance Thunderstorms

    • 65
    • 81

    Slight Chance Thunderstorms

    • 67
    • 81

    Chance Rain Showers

    • 64
    • 79

    Chance Rain Showers

Today 16 Sep Porter

Mostly sunny. Highs in the lower 80s Inland, but only in the mid 70s near the lake. Northeast Winds 5 to 10 Mph.

Tonight 16 Sep Porter

Mostly clear. Lows in the upper 50s. Northeast Winds around 5 Mph.

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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 8 September, 2025

    41 °F

  • Average September

    61.1 °F

  • Highest 14 September, 2025

    82.4 °F

Climate (2020–Present)

Michigan City Municipal Airport (11.8 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    50.7 °F

  • Average High 2020–2025

    59.1 °F
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