Lake Vermillion Recreation Area Weather Forecast

    • 58
    • 70

    Increasing Clouds

    • 60
    • 82

    Slight Chance Thunderstorms

    • 60
    • 83

    Partly Sunny

    • 62
    • 83

    Slight Chance Thunderstorms

    • 67
    • 84

    Slight Chance Thunderstorms

    • 66
    • 87

    Chance Thunderstorms

    • 62
    • 86

    Chance Thunderstorms

Today 7 Sep McCook

Sunny. Highs in the lower 70s. Southeast Winds 5 to 10 Mph.

Tonight 7 Sep McCook

Partly cloudy with a chance of Sprinkles. Not as cool with Lows in the upper 50s. Southeast Winds 10 to 15 Mph.

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Lake Vermillion Recreation Area Temperature Statistics

September Temperature

Sioux Falls, Foss Field (21.1 miles)

  • Lowest 4 September, 2025

    44.1 °F

  • Average September

    60.8 °F

  • Highest 2 September, 2025

    78.1 °F

Climate (2020–Present)

Sioux Falls, Foss Field (21.1 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    49.7 °F

  • Average High 2020–2025

    60.5 °F
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