Grass Lake Weather Forecast

    • 39
    • 62

    Partly Sunny

    • 39
    • 66

    Partly Sunny

    • 44
    • 66

    Partly Sunny

    • 46
    • 68

    Partly Sunny

    • 46
    • 68

    Mostly Cloudy

Today 22 Sep Southwestern St. Lawrence

Sunny. Highs in the lower 60s. Northeast Winds around 10 Mph.

Tonight 22 Sep Southwestern St. Lawrence

Clear. Lows in the upper 30s. Northeast Winds around 10 Mph until Midnight, becoming light and variable.

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Grass Lake Temperature Statistics

September Temperature

Fort Drum / Wheeler-Sack U. S. Army Airfield (19.9 miles)

  • Lowest 19 September, 2026

    41.2 °F

  • Average September

    64.6 °F

  • Highest 2 September, 2026

    82.2 °F

Climate (2021–2026)

Fort Drum / Wheeler-Sack U. S. Army Airfield (19.9 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    55.9 °F
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