Lake of the Isles Weather Forecast

    • 47
    • 67

    Decreasing Clouds

    • 58
    • 70

    Mostly Cloudy

    • 57
    • 73

    Mostly Cloudy

    • 45
    • 68

    Slight Chance Rain Showers

    • 47
    • 65

    Mostly Cloudy

    • 45
    • 65

    Chance Rain Showers

Today 29 Sep Jefferson

Some patchy fog Early, otherwise mostly cloudy this Morning, then becoming mostly sunny. Highs Ranging from the lower 60s on the tug hill to the mid 60s across the lower Elevations. Light north Winds.

Tonight 29 Sep Jefferson

Mainly clear in the Evening, then becoming partly cloudy with Areas of fog developing overnight. Lows Ranging from the mid 40s across the tug hill to around 50 along the lake Ontario shore. Light south Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake of the Isles Temperature Statistics

September Temperature

Fort Drum / Wheeler-Sack U. S. Army Airfield (23 miles)

  • Lowest 22 September, 2026

    38.3 °F

  • Average September

    62.3 °F

  • Highest 2 September, 2026

    82.2 °F

Climate (2021–2026)

Fort Drum / Wheeler-Sack U. S. Army Airfield (23 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    55.9 °F
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