Sky Harbor Airport Weather Forecast

    • 56
    • 61

    Chance Thunderstorms

    • 55
    • 58

    Rain Showers Likely

    • 58
    • 63

    Rain Showers Likely

    • 56
    • 66

    Chance Thunderstorms

    • 56
    • 66

    Slight Chance Thunderstorms

    • 55
    • 65

    Slight Chance Rain Showers

    • 53
    • 65

    Partly Sunny

Today 18 Sep Carlton/South St. Louis

Mostly cloudy with a slight chance of Showers and Thunderstorms. Much cooler. Near steady temperature in the lower 60s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 18 Sep Carlton/South St. Louis

Cloudy with a chance of Thunderstorms. A chance of Showers. Lows in the mid 50s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sky Harbor Airport Temperature Statistics

September Temperature

Duluth - Sky Harbor Airport (0 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    57.7 °F

  • Highest 2 September, 2025

    75.2 °F

Climate (2020–Present)

Duluth - Sky Harbor Airport (0 miles)

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  • Average Low 2020–2025

    35.9 °F

  • Average 2020–2025

    42.7 °F

  • Average High 2020–2025

    49.7 °F
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