Summit Lake Weather Forecast

    • 65
    • 92

    Mostly Sunny

    • 67
    • 84

    Partly Sunny

    • 72
    • 91

    Chance Thunderstorms

    • 63
    • 88

    Mostly Sunny

    • 59
    • 76

    Partly Sunny

    • 61
    • 77

    Partly Sunny

Today 17 Jul Grant

Mostly sunny. Hot with Highs in the mid 90s. Southwest Winds 10 to 15 Mph, becoming northwest this afternoon.

Tonight 17 Jul Grant

Mostly clear. Humid with Lows in the mid 60s. North Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

Summit Lake Temperature Statistics

July Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 9 July, 2026

    57 °F

  • Average July

    75.1 °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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