Upper Big Bay Weather Forecast

    • 47
    • 81

    Increasing Clouds

    • 38
    • 67

    Mostly Sunny

    • 39
    • 65

    Mostly Sunny

    • 58
    • 77

    Partly Sunny

    • 60
    • 77

    Chance Rain Showers

    • 56
    • 78

    Chance Rain Showers

Today 18 Sep Southwestern St. Lawrence

Sunny in the Morning, then becoming partly sunny. Highs in the upper 70s. Southwest Winds around 10 Mph.

Tonight 18 Sep Southwestern St. Lawrence

Mostly clear. Lows in the lower 50s. Light and variable Winds.

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Upper Big Bay Temperature Statistics

September Temperature

Fort Drum / Wheeler-Sack U. S. Army Airfield (34.8 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    61.6 °F

  • Highest 4 September, 2025

    81.9 °F

Climate (2020–Present)

Fort Drum / Wheeler-Sack U. S. Army Airfield (34.8 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    48.1 °F

  • Average High 2020–2025

    56.2 °F
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