Riverside Weather Forecast

    • 61
    • 84

    Increasing Clouds

    • 61
    • 78

    Chance Thunderstorms

    • 61
    • 77

    Chance Thunderstorms

    • 61
    • 76

    Chance Thunderstorms

    • 58
    • 77

    Chance Rain Showers

    • 55
    • 76

    Slight Chance Thunderstorms

Today 18 Sep Waukesha

Sunny. Highs in the lower 80s. South Winds up to 5 Mph shifting to the east in the afternoon.

Tonight 18 Sep Waukesha

Partly cloudy until early morning then becoming mostly cloudy. Lows in the lower 60s. Northeast Winds up to 10 Mph.

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Riverside Temperature Statistics

September Temperature

Watertown (11.8 miles)

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  • Average September

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Climate (2020–Present)

Watertown (11.8 miles)

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  • Average Low 2020–2025

    35.7 °F

  • Average 2020–2025

    45.4 °F

  • Average High 2020–2025

    54.5 °F
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