Summit Lake Weather Forecast

    • 65
    • 74

    Chance Rain Showers

    • 60
    • 78

    Partly Sunny

    • 57
    • 74

    Mostly Sunny

    • 62
    • 77

    Chance Rain Showers

    • 58
    • 75

    Rain Showers Likely

    • 56
    • 71

    Slight Chance Thunderstorms

Today 14 Aug Grant

Partly sunny. A slight chance of Showers this afternoon. Highs in the upper 70s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 14 Aug Grant

Mostly cloudy. A slight chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Humid with Lows in the mid 60s. Southeast Winds 10 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summit Lake Temperature Statistics

August Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 5 August, 2026

    52 °F

  • Average August

    69.4 °F

  • Highest 3 August, 2026

    84.9 °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

    46.4 °F

  • Average High 2021–2026

    57 °F
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