St Leonards Weather Forecast

    • 62
    • 83

    Increasing Clouds

    • 62
    • 77

    Chance Thunderstorms

    • 61
    • 77

    Chance Thunderstorms

    • 61
    • 77

    Chance Thunderstorms

    • 59
    • 77

    Chance Rain Showers

    • 56
    • 75

    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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St Leonards Temperature Statistics

September Temperature

Waukesha County Airport (10.6 miles)

  • Lowest 8 September, 2025

    41 °F

  • Average September

    58.9 °F

  • Highest 12 September, 2025

    80.6 °F

Climate (2020–Present)

Waukesha County Airport (10.6 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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