Hartland Weather Forecast

    • -17
    • -7

    Cold

    • -4
    • 3

    Cold

    • -7
    • 11

    Chance Snow

    • 2
    • 8

    Cold

    • -3
    • 13

    Partly Sunny

    • -4
    • 10

    Partly Sunny

Today 23 Jan Waukesha

Bitterly cold. Much Colder. Sunny. Highs around 7 below. Northwest Winds 10 to 15 Mph. Lowest wind chill Readings 32 below to 42 below zero until late afternoon.

Tonight 23 Jan Waukesha

Bitterly cold. Mostly clear. Lows around 17 below. Northwest Winds up to 10 Mph. Wind chill Readings 21 below to 31 below zero.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hartland Temperature Statistics

January Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 19 January, 2026

    -2.2 °F

  • Average January

    24.4 °F

  • Highest 9 January, 2026

    57.2 °F

Climate (2021–Present)

Waukesha County Airport (6.2 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    56.4 °F
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