Hartland Weather Forecast

    • 31
    • 46

    Becoming Sunny

    • 27
    • 46

    Partly Sunny

    • 39
    • 51

    Partly Sunny

    • 42
    • 70

    Mostly Sunny

    • 48
    • 67

    Mostly Sunny

    • 58
    • 77

    Rain Showers Likely

    • 41
    • 70

    Chance Rain Showers

Today 18 Apr Waukesha

Much cooler. Mostly cloudy. Near steady temperature in the mid 40s. West Winds 15 to 20 Mph.

Tonight 18 Apr Waukesha

Partly cloudy in the evening then clearing. Lows in the lower 30s. West Winds 5 to 15 Mph. Gusts up to 30 Mph through around midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hartland Temperature Statistics

April Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    45.8 °F

  • Highest 12 April, 2026

    73.4 °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

    56.5 °F
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