Grass Lake Weather Forecast

    • 54
    • 75

    Increasing Clouds

    • 52
    • 71

    Chance Rain Showers

    • 55
    • 73

    Rain Showers Likely

    • 51
    • 72

    Chance Thunderstorms

    • 51
    • 72

    Partly Sunny

    • 54
    • 75

    Partly Sunny

Today 20 Jun Codington

Mostly sunny. Highs in the mid 70s. North Winds 5 to 10 Mph.

Tonight 20 Jun Codington

Mostly cloudy. Lows in the mid 50s. East Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

June Temperature

Watertown, Watertown Municipal Airport (16.2 miles)

  • Lowest 14 June, 2026

    43.6 °F

  • Average June

    68 °F

  • Highest 9 June, 2026

    91.7 °F

Climate (2021–2026)

Watertown, Watertown Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    35.1 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    55.9 °F
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