Duluth Weather Forecast

    • 55
    • 60

    Chance Rain Showers

    • 55
    • 67

    Partly Sunny

    • 56
    • 66

    Chance Rain Showers

    • 56
    • 66

    Mostly Cloudy

    • 58
    • 67

    Rain Showers Likely

    • 55
    • 63

    Rain Showers Likely

    • 51
    • 62

    Chance Rain Showers

Today 24 Sep Carlton/South St. Louis

Partly sunny with a 20 percent chance of Showers. Highs in the lower 60s.

Tonight 24 Sep Carlton/South St. Louis

Mostly cloudy. A chance of Showers early this evening. Patchy fog. Near steady temperature in the mid 50s. South Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Duluth Temperature Statistics

September Temperature

Duluth - Sky Harbor Airport (5 miles)

  • Lowest 22 September, 2026

    44.6 °F

  • Average September

    62.2 °F

  • Highest 1 September, 2026

    84.2 °F

Climate (2021–2026)

Duluth - Sky Harbor Airport (5 miles)

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  • Average Low 2021–2026

    35.7 °F

  • Average 2021–2026

    42.5 °F

  • Average High 2021–2026

    49.4 °F
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