Duluth International Airport Weather Forecast

    • 49
    • 68

    Gradual Clearing

    • 51
    • 67

    Rain Showers Likely

    • 53
    • 65

    Rain Showers

    • 49
    • 69

    Partly Sunny

    • 41
    • 63

    Mostly Sunny

    • 41
    • 60

    Partly Sunny

Today 27 Sep Carlton/South St. Louis

Cloudy late this Morning, then becoming partly sunny. Highs in the upper 60s. Southwest Winds around 5 Mph.

Tonight 27 Sep Carlton/South St. Louis

Mostly clear in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the upper 40s. West Winds around 5 Mph, becoming north after midnight.

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Duluth International Airport Temperature Statistics

September Temperature

Duluth International Airport (0 miles)

  • Lowest 14 September, 2026

    39.7 °F

  • Average September

    59.8 °F

  • Highest 1 September, 2026

    81.6 °F

Climate (2021–2026)

Duluth International Airport (0 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    42.2 °F

  • Average High 2021–2026

    51 °F
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