Grass Lake Weather Forecast

    • 59
    • 78

    Increasing Clouds

    • 62
    • 84

    Chance Rain Showers

    • 58
    • 78

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

    • 61
    • 81

    Rain Showers Likely

    • 59
    • 77

    Partly Sunny

    • 60
    • 78

    Slight Chance Thunderstorms

Today 5 Aug Codington

Mostly sunny. Near steady temperature in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 5 Aug Codington

Partly cloudy this Evening, then clearing. Not as cool with Lows in the upper 50s. South Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

August Temperature

Watertown, Watertown Municipal Airport (16.2 miles)

  • Lowest 1 August, 2026

    56.6 °F

  • Average August

    72.7 °F

  • Highest 3 August, 2026

    86 °F

Climate (2021–2026)

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

    56 °F
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