Grenville Weather Forecast

    • 62
    • 77

    Chance Rain Showers

    • 64
    • 78

    Chance Rain Showers

    • 61
    • 80

    Mostly Sunny

    • 58
    • 76

    Slight Chance Thunderstorms

    • 60
    • 77

    Slight Chance Thunderstorms

    • 61
    • 77

    Chance Rain Showers

Today 23 Aug Day

Partly sunny. Highs in the upper 70s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 23 Aug Day

Partly cloudy. Near steady temperature in the upper 50s. Southeast Winds 5 to 10 Mph.

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Grenville Temperature Statistics

August Temperature

Sisseton, Sisseton Municipal Airport (23.6 miles)

  • Lowest 5 August, 2026

    52 °F

  • Average August

    69.7 °F

  • Highest 20 August, 2026

    86 °F

Climate (2021–2026)

Sisseton, Sisseton Municipal Airport (23.6 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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