Hartland Weather Forecast

    • 37
    • 57

    Rain Showers

    • 45
    • 64

    Slight Chance Rain Showers

    • 40
    • 68

    Chance Rain Showers

    • 38
    • 59

    Partly Sunny

    • 42
    • 61

    Rain Showers Likely

    • 45
    • 64

    Chance Rain Showers

Today 7 May Waukesha

Partly sunny. Areas of frost in the morning. Scattered light rain Showers late in the morning. Scattered light rain Showers and slight chance of Thunderstorms in the afternoon. Highs in the upper 50s. West Winds 5 to 15 Mph. Chance of precipitation 40 percent.

Tonight 7 May Waukesha

Partly cloudy. Areas of frost early in the morning. Lows in the mid 30s. West Winds up to 5 Mph through around midnight becoming calm.

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Hartland Temperature Statistics

May Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    49.6 °F

  • Highest 4 May, 2026

    78.8 °F

Climate (2021–Present)

Waukesha County Airport (6.2 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    46 °F

  • Average High 2021–2026

    56.6 °F
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