Summit Lake Weather Forecast

    • 69
    • 91

    Chance Thunderstorms

    • 68
    • 84

    Rain Showers

    • 61
    • 78

    Rain Showers Likely

    • 62
    • 78

    Partly Sunny

    • 64
    • 82

    Partly Sunny

    • 70
    • 88

    Mostly Sunny

Today 6 Jul Grant

Mostly sunny. Hot with Highs in the lower 90s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 6 Jul Grant

Mostly cloudy with a 50 percent chance of Thunderstorms. Humid with Lows in the upper 60s. South Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming west after midnight.

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Summit Lake Temperature Statistics

July Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 3 July, 2026

    59 °F

  • Average July

    73 °F

  • Highest 3 July, 2026

    86 °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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