Grass Lake Weather Forecast

    • 63
    • 85

    Chance Thunderstorms

    • 58
    • 83

    Rain Showers Likely

    • 41
    • 69

    Partly Sunny

    • 42
    • 60

    Partly Sunny

    • 46
    • 66

    Slight Chance Rain Showers

    • 48
    • 67

    Chance Rain Showers

Today 18 May Southwestern St. Lawrence

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms this Morning, then sunny this afternoon. Highs in the mid 80s. Southeast Winds around 10 Mph, becoming southwest with Gusts up to 25 Mph this afternoon. Chance of rain 40 percent.

Tonight 18 May Southwestern St. Lawrence

Clear until Midnight, then partly cloudy with a slight chance of Showers after midnight. Lows in the mid 60s. Southwest Winds around 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

May Temperature

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

  • Lowest 11 May, 2026

    34.3 °F

  • Average May

    48.5 °F

  • Highest 5 May, 2026

    70.3 °F

Climate (2021–Present)

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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