Duluth International Airport Weather Forecast

    • 54
    • 77

    Becoming Sunny

    • 57
    • 78

    Partly Sunny

    • 56
    • 79

    Mostly Sunny

    • 54
    • 75

    Slight Chance Thunderstorms

    • 52
    • 72

    Partly Sunny

    • 53
    • 72

    Partly Sunny

Today 9 Aug Carlton/South St. Louis

Mostly sunny. Highs in the upper 70s. East Winds around 5 Mph, becoming north around 5 Mph this afternoon.

Tonight 9 Aug Carlton/South St. Louis

Clear. Lows in the lower 50s. North Winds around 5 Mph.

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Duluth International Airport Temperature Statistics

August Temperature

Duluth International Airport (0 miles)

  • Lowest 5 August, 2026

    48.7 °F

  • Average August

    65.8 °F

  • Highest 6 August, 2026

    80.1 °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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