Lost Lake Weather Forecast

    • 62
    • 89

    Chance Thunderstorms

    • 62
    • 79

    Rain Showers

    • 59
    • 74

    Rain Showers Likely

    • 55
    • 70

    Rain Showers Likely

    • 57
    • 74

    Partly Sunny

    • 59
    • 77

    Slight Chance Thunderstorms

Today 16 Sep Minnehaha

Sunny. Highs in the upper 80s. South Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 16 Sep Minnehaha

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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Lost Lake Temperature Statistics

September Temperature

Sioux Falls, Foss Field (16.2 miles)

  • Lowest 7 September, 2025

    36 °F

  • Average September

    65 °F

  • Highest 13 September, 2025

    90 °F

Climate (2020–Present)

Sioux Falls, Foss Field (16.2 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    49.8 °F

  • Average High 2020–2025

    60.6 °F
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