Summit Lake Weather Forecast

    • 65
    • 89

    Patchy Smoke

    • 57
    • 76

    Partly Sunny

    • 62
    • 78

    Mostly Sunny

    • 64
    • 81

    Mostly Cloudy

    • 68
    • 83

    Mostly Sunny

    • 73
    • 89

    Mostly Sunny

Today 20 Jul Grant

Mostly sunny. A slight chance of Thunderstorms this morning. Patchy smoke this afternoon. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to northwest 15 to 20 Mph with Gusts up to 35 Mph this afternoon. Chance of rain 20 percent.

Tonight 20 Jul Grant

Patchy smoke in the evening. Mostly clear. Lows in the mid 60s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

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Summit Lake Temperature Statistics

July Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 9 July, 2026

    57 °F

  • Average July

    76 °F

  • Highest 14 July, 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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