Marietta Weather Forecast

    • 65
    • 85

    Mostly Cloudy

    • 64
    • 87

    Chance Rain Showers

    • 63
    • 83

    Slight Chance Thunderstorms

    • 60
    • 86

    Chance Thunderstorms

    • 57
    • 77

    Chance Rain Showers

    • 54
    • 71

    Chance Rain Showers

    • 51
    • 70

    Partly Sunny

Today 13 Sep Lac Qui Parle

Partly sunny. Highs in the mid 80s. East Winds 5 to 15 Mph.

Tonight 13 Sep Lac Qui Parle

Mostly cloudy. Lows in the mid 60s. Southeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Marietta Temperature Statistics

September Temperature

Madison, Madison-Lac Qui Parle County Airport (11.8 miles)

  • Lowest 7 September, 2025

    37.4 °F

  • Average September

    58.7 °F

  • Highest 11 September, 2025

    80.6 °F

Climate (2020–Present)

Madison, Madison-Lac Qui Parle County Airport (11.8 miles)

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  • Average Low 2020–2025

    37.5 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    58.4 °F
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