Downtown - Waterfront Weather Forecast

    • 54
    • 64

    Chance Rain Showers

    • 54
    • 68

    Slight Chance Rain Showers

    • 56
    • 66

    Chance Rain Showers

    • 55
    • 65

    Rain Showers Likely

    • 54
    • 66

    Chance Rain Showers

    • 49
    • 63

    Mostly Cloudy

Today 26 Sep Carlton/South St. Louis

Mostly cloudy. A chance of Showers this afternoon. Highs in the mid 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 26 Sep Carlton/South St. Louis

Showers likely. Lows in the lower 50s. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Downtown - Waterfront Temperature Statistics

September Temperature

Duluth - Sky Harbor Airport (5 miles)

  • Lowest 22 September, 2026

    44.6 °F

  • Average September

    61.6 °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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