Oconomowoc Weather Forecast

    • 61
    • 83

    Mostly Sunny

    • 60
    • 84

    Partly Sunny

    • 59
    • 77

    Slight Chance Thunderstorms

    • 60
    • 75

    Slight Chance Thunderstorms

    • 61
    • 79

    Chance Thunderstorms

    • 59
    • 79

    Chance Thunderstorms

Today 17 Sep Waukesha

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

Tonight 17 Sep Waukesha

Mostly clear. Lows in the lower 60s. South Winds up to 5 Mph through around midnight becoming calm.

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Oconomowoc 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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