Summit Lake Weather Forecast

    • 60
    • 74

    Rain Showers Likely

    • 62
    • 77

    Mostly Sunny

    • 66
    • 80

    Mostly Sunny

    • 60
    • 82

    Rain Showers Likely

    • 56
    • 68

    Partly Sunny

    • 59
    • 72

    Slight Chance Thunderstorms

Today 31 Jul Grant

Mostly cloudy this Morning, then becoming partly sunny. Showers likely this morning. A slight chance of Thunderstorms. Patchy smoke. Breezy with Highs in the mid 70s. Northeast Winds 15 to 25 Mph, becoming north 10 to 15 Mph this afternoon. Chance of rain 70 percent.

Tonight 31 Jul Grant

Patchy smoke in the evening. Partly cloudy. Humid with Lows in the upper 50s. North Winds 5 to 10 Mph.

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Summit Lake Temperature Statistics

July Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 22 July, 2026

    52 °F

  • Average July

    75.1 °F

  • Highest 26 July, 2026

    93 °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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