South Haven Weather Forecast

    • 64
    • 88

    Increasing Clouds

    • 62
    • 83

    Chance Rain Showers

    • 63
    • 79

    Rain Showers Likely

    • 62
    • 77

    Chance Thunderstorms

    • 61
    • 76

    Chance Rain Showers

    • 59
    • 74

    Slight Chance Rain Showers

Today 19 Sep Porter

Increasing cloudiness. Highs in the upper 80s Inland, but only in the lower 80s near the lake. Southeast Winds 5 to 10 Mph.

Tonight 19 Sep Porter

Mostly cloudy. Isolated Showers and Thunderstorms late in the evening. Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

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South Haven Temperature Statistics

September Temperature

Valparaiso Porter County Municipal Airport (9.3 miles)

  • Lowest 8 September, 2025

    42.1 °F

  • Average September

    64.2 °F

  • Highest 14 September, 2025

    84.9 °F

Climate (2020–Present)

Valparaiso Porter County Municipal Airport (9.3 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    61.4 °F
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