Rock River Park Weather Forecast

    • 61
    • 84

    Increasing Clouds

    • 62
    • 81

    Chance Thunderstorms

    • 61
    • 77

    Chance Thunderstorms

    • 59
    • 74

    Chance Thunderstorms

    • 59
    • 77

    Chance Rain Showers

    • 57
    • 75

    Slight Chance Thunderstorms

    • 56
    • 74

    Partly Sunny

Today 18 Sep Jefferson

Mostly sunny. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 18 Sep Jefferson

Partly cloudy through around midnight then becoming mostly cloudy. Lows in the lower 60s. East Winds up to 10 Mph.

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Rock River Park Temperature Statistics

September Temperature

Watertown (17.4 miles)

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  • Average September

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Climate (2020–Present)

Watertown (17.4 miles)

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  • Average Low 2020–2025

    35.6 °F

  • Average 2020–2025

    45.4 °F

  • Average High 2020–2025

    54.4 °F
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