Duluth Harbor Basin Weather Forecast

    • 37
    • 42

    Rain Showers Likely

    • 38
    • 58

    Partly Sunny

    • 39
    • 51

    Chance Rain Showers

    • 37
    • 47

    Mostly Cloudy

    • 40
    • 51

    Mostly Cloudy

    • 45
    • 56

    Chance Rain Showers

Today 22 Apr Carlton/South St. Louis

Mostly cloudy with a 50 percent chance of Showers. Cooler. Near steady temperature in the mid 40s. Southeast Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 22 Apr Carlton/South St. Louis

Mostly cloudy. A slight chance of rain Showers after midnight. Areas of fog after midnight. Lows in the mid 30s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Duluth Harbor Basin Temperature Statistics

April Temperature

Duluth - Sky Harbor Airport (3.7 miles)

  • Lowest 8 April, 2025

    21.2 °F

  • Average April

    36.8 °F

  • Highest 11 April, 2025

    59 °F

Climate (2020–Present)

Duluth - Sky Harbor Airport (3.7 miles)

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  • Average Low 2020–2025

    35.9 °F

  • Average 2020–2025

    42.8 °F

  • Average High 2020–2025

    49.8 °F
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