Marietta Weather Forecast

    • 46
    • 69

    Mostly Sunny

    • 53
    • 82

    Slight Chance Thunderstorms

    • 57
    • 89

    Mostly Sunny

    • 58
    • 90

    Mostly Sunny

    • 57
    • 86

    Mostly Cloudy

    • 55
    • 83

    Slight Chance Thunderstorms

    • 53
    • 80

    Slight Chance Thunderstorms

Today 23 May Lac Qui Parle

Warmer. Mostly sunny. Highs in the upper 60s. Northwest Winds 5 to 15 Mph.

Tonight 23 May Lac Qui Parle

Mostly clear. Lows in the mid 40s. Northwest Winds up to 5 Mph shifting to the south after midnight.

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Marietta Temperature Statistics

May Temperature

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

  • Lowest 5 May, 2026

    28.4 °F

  • Average May

    53.6 °F

  • Highest 15 May, 2026

    84.2 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    37.1 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    58.2 °F
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