Duluth International Airport Weather Forecast

    • 43
    • 56

    Slight Chance Rain Showers

    • 50
    • 75

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

    • 52
    • 83

    Mostly Sunny

    • 47
    • 69

    Mostly Sunny

    • 45
    • 67

    Mostly Sunny

    • 44
    • 68

    Mostly Sunny

Today 23 May Carlton/South St. Louis

Mostly cloudy with a 20 percent chance of Showers. Near steady temperature in the upper 50s. South Winds 5 to 10 Mph.

Tonight 23 May Carlton/South St. Louis

Mostly cloudy with a slight chance of Showers in the Evening, then partly cloudy after midnight. Lows in the lower 40s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Duluth International Airport Temperature Statistics

May Temperature

Duluth International Airport (0 miles)

  • Lowest 1 May, 2026

    23.6 °F

  • Average May

    46.5 °F

  • Highest 15 May, 2026

    81.6 °F

Climate (2021–Present)

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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