Lake of the Isles Weather Forecast

    • 54
    • 74

    Slight Chance Thunderstorms

    • 57
    • 78

    Mostly Sunny

    • 65
    • 82

    Slight Chance Rain Showers

    • 65
    • 82

    Chance Thunderstorms

    • 63
    • 80

    Chance Thunderstorms

    • 65
    • 81

    Partly Sunny

    • 65
    • 81

    Chance Rain Showers

Today 3 Aug Jefferson

Mostly cloudy Early, then becoming partly sunny. A 50 percent chance of Showers. Highs Ranging from the upper 60s on the tug hill to the lower 70s across the lower Elevations. Northwest Winds 10 to 15 Mph.

Tonight 3 Aug Jefferson

Mainly clear with some patchy fog developing from late evening on. Lows Ranging from the mid 50s across the tug hill to the upper 50s along the lake Ontario shore. West Winds 5 to 10 Mph, becoming light.

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  • Temperature Forecast NOAA

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Lake of the Isles Temperature Statistics

August Temperature

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

  • Lowest 1 August, 2026

    63.1 °F

  • Average August

    74.3 °F

  • Highest 1 August, 2026

    85.3 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    56 °F
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