Duluth International Airport Weather Forecast

    • 48
    • 72

    Mostly Sunny

    • 54
    • 74

    Chance Rain Showers

    • 57
    • 79

    Rain Showers

    • 54
    • 75

    Chance Rain Showers

    • 51
    • 76

    Mostly Sunny

    • 51
    • 74

    Slight Chance Rain Showers

Today 23 Aug Carlton/South St. Louis

Patchy fog this morning. Sunny. Highs in the mid 70s. North Winds around 5 Mph.

Tonight 23 Aug Carlton/South St. Louis

Mostly clear. Patchy fog after midnight. Lows in the mid 40s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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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

    66.1 °F

  • Highest 17 August, 2026

    81.6 °F

Climate (2021–2026)

Duluth International Airport (0 miles)

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  • Average Low 2021–2026

    33.2 °F

  • Average 2021–2026

    42.1 °F

  • Average High 2021–2026

    51 °F
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