Grass Lake Weather Forecast

    • 30
    • 77

    Chance Rain

    • 25
    • 42

    Partly Sunny

    • 35
    • 51

    Mostly Cloudy

    • 35
    • 54

    Mostly Cloudy

    • 32
    • 61

    Slight Chance Rain

    • 20
    • 43

    Mostly Cloudy

Today 21 Mar Codington

Mostly sunny. Warmer with Highs in the upper 70s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 21 Mar Codington

Mostly cloudy. A chance of Sprinkles with a slight chance of snow after midnight. Breezy, Colder with Lows around 30. North Winds 20 to 25 Mph with Gusts up to 35 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

March Temperature

Watertown, Watertown Municipal Airport (16.2 miles)

  • Lowest 16 March, 2026

    -1.4 °F

  • Average March

    30.3 °F

  • Highest 19 March, 2026

    69.1 °F

Climate (2021–Present)

Watertown, Watertown Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    55.9 °F
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