Marshall Park Lake Keesus Weather Forecast

    • 69
    • 81

    Rain Showers Likely

    • 61
    • 82

    Slight Chance Thunderstorms

    • 59
    • 74

    Partly Sunny

    • 58
    • 77

    Mostly Sunny

    • 60
    • 80

    Partly Sunny

    • 53
    • 76

    Mostly Sunny

Today 18 Aug Waukesha

Mostly cloudy. Chance of light Showers and Thunderstorms until late Afternoon, then light Showers likely and chance of Thunderstorms late in the afternoon. Highs in the lower 80s. Southeast Winds 5 to 10 Mph. Chance of precipitation 60 percent.

Tonight 18 Aug Waukesha

Showers likely and chance of Thunderstorms until early Morning, then chance of Showers and Thunderstorms early in the morning. Locally heavy rainfall possible after midnight. Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of precipitation 70 percent.

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Marshall Park Lake Keesus Temperature Statistics

August Temperature

Waukesha County Airport (8.7 miles)

  • Lowest 2 August, 2025

    51.8 °F

  • Average August

    70.2 °F

  • Highest 9 August, 2025

    91.4 °F

Climate (2020–Present)

Waukesha County Airport (8.7 miles)

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  • Average Low 2020–2025

    38.2 °F

  • Average 2020–2025

    45.7 °F

  • Average High 2020–2025

    56.2 °F
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