Saint Louis Bay Weather Forecast

    • 67
    • 80

    Chance Thunderstorms

    • 59
    • 83

    Chance Thunderstorms

    • 55
    • 71

    Partly Sunny

    • 50
    • 64

    Slight Chance Thunderstorms

    • 46
    • 67

    Mostly Sunny

    • 52
    • 70

    Partly Sunny

Today 21 Aug Carlton/South St. Louis

Patchy dense fog this morning. Mostly sunny. Highs around 80. South Winds 5 to 10 Mph.

Tonight 21 Aug Carlton/South St. Louis

Mostly cloudy with a chance of Showers and Thunderstorms. Humid with Lows in the mid 60s. Southwest Winds around 5 Mph. Chance of rain 40 percent.

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Saint Louis Bay Temperature Statistics

August Temperature

Duluth - Sky Harbor Airport (3.7 miles)

  • Lowest 1 August, 2025

    53.6 °F

  • Average August

    69.9 °F

  • Highest 7 August, 2025

    86 °F

Climate (2020–Present)

Duluth - Sky Harbor Airport (3.7 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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