Summit Lake Weather Forecast

    • 56
    • 84

    Rain Showers Likely

    • 54
    • 71

    Mostly Sunny

    • 61
    • 75

    Mostly Sunny

    • 63
    • 79

    Mostly Sunny

    • 66
    • 81

    Mostly Sunny

    • 66
    • 81

    Slight Chance Thunderstorms

Today 3 Aug Grant

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

Tonight 3 Aug Grant

Showers likely with a chance of Thunderstorms. Patchy smoke. Lows in the mid 50s. South Winds 15 to 20 Mph, becoming northwest after midnight. Gusts up to 35 Mph. Chance of rain 70 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 1 August, 2026

    59 °F

  • Average August

    70.3 °F

  • Highest 1 August, 2026

    81 °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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