Hartland Weather Forecast

    • 60
    • 81

    Increasing Clouds

    • 60
    • 77

    Chance Thunderstorms

    • 55
    • 77

    Mostly Sunny

    • 54
    • 75

    Partly Sunny

    • 57
    • 76

    Partly Sunny

    • 63
    • 79

    Slight Chance Thunderstorms

    • 60
    • 80

    Slight Chance Thunderstorms

Today 20 Aug Waukesha

Partly sunny. Southeast Winds up to 5 Mph.

Tonight 20 Aug Waukesha

Partly cloudy until early morning then becoming mostly cloudy. Lows in the upper 50s. South Winds up to 5 Mph.

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Hartland Temperature Statistics

August Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 3 August, 2026

    57.2 °F

  • Average August

    72.1 °F

  • Highest 16 August, 2026

    86 °F

Climate (2021–2026)

Waukesha County Airport (6.2 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    46.2 °F

  • Average High 2021–2026

    56.6 °F
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