Hartland Weather Forecast

    • 63
    • 79

    Chance Rain Showers

    • 65
    • 78

    Rain Showers

    • 68
    • 79

    Rain Showers

    • 62
    • 81

    Slight Chance Thunderstorms

    • 59
    • 78

    Mostly Sunny

    • 64
    • 78

    Chance Rain Showers

    • 60
    • 78

    Chance Rain Showers

Today 13 Aug Waukesha

Light rain. East Winds around 5 Mph. Chance of rain 90 percent.

Tonight 13 Aug Waukesha

Mostly cloudy with a 40 percent chance of light rain. Lows in the mid 60s. East 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

    72.3 °F

  • Highest 4 August, 2026

    84.2 °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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