Duluth International Airport Weather Forecast

    • 66
    • 88

    Increasing Clouds

    • 62
    • 88

    Slight Chance Thunderstorms

    • 53
    • 76

    Partly Sunny

    • 56
    • 77

    Mostly Sunny

    • 60
    • 83

    Partly Sunny

    • 59
    • 81

    Slight Chance Rain Showers

Today 19 Jul Carlton/South St. Louis

Mostly sunny. A chance of Sprinkles in the morning. Patchy smoke in the morning. Hot with Highs in the mid 80s. Southwest Winds 5 to 10 Mph.

Tonight 19 Jul Carlton/South St. Louis

Partly cloudy. Patchy smoke. Near steady temperature in the lower 60s. South Winds around 5 Mph.

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Duluth International Airport Temperature Statistics

July Temperature

Duluth International Airport (0 miles)

  • Lowest 6 July, 2026

    52.6 °F

  • Average July

    72.4 °F

  • Highest 13 July, 2026

    93.7 °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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