Grass Lake Weather Forecast

    • 41
    • 59

    Mostly Cloudy

    • 40
    • 61

    Partly Sunny

    • 42
    • 65

    Partly Sunny

    • 43
    • 67

    Partly Sunny

    • 46
    • 67

    Partly Sunny

    • 47
    • 66

    Mostly Cloudy

Today 21 Sep Southwestern St. Lawrence

Partly sunny. Highs in the upper 50s. North Winds around 10 Mph.

Tonight 21 Sep Southwestern St. Lawrence

Partly cloudy. Lows around 40. Northeast Winds around 10 Mph until Midnight, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

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

    65.1 °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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