Marietta Weather Forecast

    • 24
    • 38

    Decreasing Clouds

    • 21
    • 29

    Mostly Cloudy

    • 29
    • 41

    Mostly Cloudy

    • 18
    • 44

    Mostly Cloudy

    • 19
    • 31

    Mostly Cloudy

    • 12
    • 31

    Mostly Cloudy

Today 22 Dec Lac Qui Parle

Partly sunny in the morning then clearing. Highs in the upper 30s. Southeast Winds up to 5 Mph.

Tonight 22 Dec Lac Qui Parle

Partly cloudy. Near steady temperature in the upper 20s. West Winds up to 10 Mph.

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Marietta Temperature Statistics

December Temperature

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

  • Lowest 4 December, 2025

    -13 °F

  • Average December

    15.4 °F

  • Highest 16 December, 2025

    48.2 °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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