Summit Lake Weather Forecast

    • 60
    • 87

    Mostly Sunny

    • 60
    • 87

    Partly Sunny

    • 58
    • 85

    Mostly Sunny

    • 58
    • 81

    Mostly Cloudy

    • 57
    • 78

    Chance Thunderstorms

    • 54
    • 76

    Chance Rain Showers

Today 25 May Grant

Mostly sunny. Highs in the upper 80s. South Winds 5 to 10 Mph.

Tonight 25 May Grant

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 50s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summit Lake Temperature Statistics

May Temperature

Sisseton, Sisseton Municipal Airport (26.1 miles)

  • Lowest 7 May, 2026

    26.1 °F

  • Average May

    53.2 °F

  • Highest 14 May, 2026

    81 °F

Climate (2021–Present)

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

    57.1 °F
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