Duluth Weather Forecast

    • 31
    • 41

    Chance Rain

    • 35
    • 43

    Mostly Cloudy

    • 33
    • 45

    Mostly Cloudy

    • 30
    • 47

    Chance Snow

    • 21
    • 39

    Partly Sunny

    • 28
    • 39

    Mostly Cloudy

Today 18 Mar Carlton/South St. Louis

Mostly cloudy with a slight chance of very light freezing drizzle. A slight chance of snow this Morning, then a slight chance of drizzle this afternoon. Not as cool with Highs in the lower 40s. Southwest Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 18 Mar Carlton/South St. Louis

Mostly cloudy with a chance of snow. A chance of Rain, drizzle and freezing rain in the Evening, then a slight chance of freezing rain after midnight. Little or no snow accumulation. Ice accumulation around a trace. Not as cool with Lows in the upper 20s. Southwest Winds around 5 Mph, becoming northwest after midnight. Chance of precipitation 40 percent.

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Duluth Temperature Statistics

March Temperature

Duluth - Sky Harbor Airport (5 miles)

  • Lowest 1 March, 2026

    3.2 °F

  • Average March

    30.8 °F

  • Highest 8 March, 2026

    53.6 °F

Climate (2021–Present)

Duluth - Sky Harbor Airport (5 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    42.8 °F

  • Average High 2021–2026

    49.8 °F
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