Summit Lake Weather Forecast

    • 56
    • 84

    Decreasing Clouds

    • 48
    • 67

    Partly Sunny

    • 49
    • 57

    Rain Showers

    • 50
    • 63

    Partly Sunny

    • 49
    • 64

    Partly Sunny

    • 52
    • 67

    Slight Chance Rain Showers

Today 11 Sep Grant

Partly sunny. Highs in the mid 80s. South Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 11 Sep Grant

Partly cloudy with a slight chance of Thunderstorms in the Evening, then mostly clear after midnight. Cooler. Less humid with Lows in the mid 50s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summit Lake Temperature Statistics

September Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 1 September, 2026

    53.1 °F

  • Average September

    71.7 °F

  • Highest 3 September, 2026

    91.9 °F

Climate (2021–2026)

Sisseton, Sisseton Municipal Airport (26.1 miles)

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  • Average Low 2021–2026

    35.9 °F

  • Average 2021–2026

    46.5 °F

  • Average High 2021–2026

    57 °F
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