Grenville Weather Forecast

    • 69
    • 84

    Chance Thunderstorms

    • 61
    • 75

    Rain Showers Likely

    • 63
    • 78

    Mostly Sunny

    • 67
    • 81

    Chance Thunderstorms

    • 69
    • 85

    Slight Chance Thunderstorms

    • 69
    • 87

    Chance Thunderstorms

    • 64
    • 84

    Mostly Sunny

Today 22 Jul Day

Partly sunny with a 20 percent chance of Thunderstorms. Near steady temperature in the lower 80s. South Winds 5 to 10 Mph.

Tonight 22 Jul Day

Mostly cloudy with a 50 percent chance of Thunderstorms. Lows in the upper 60s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grenville Temperature Statistics

July Temperature

Sisseton, Sisseton Municipal Airport (23.6 miles)

  • Lowest 17 July, 2025

    49.6 °F

  • Average July

    71 °F

  • Highest 4 July, 2025

    92.6 °F

Climate (2020–Present)

Sisseton, Sisseton Municipal Airport (23.6 miles)

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  • Average Low 2020–2025

    36 °F

  • Average 2020–2025

    46.6 °F

  • Average High 2020–2025

    57.1 °F
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