Hartland Weather Forecast

    • 11
    • 13

    Increasing Clouds

    • 6
    • 23

    Chance Snow Showers

    • -13
    • 14

    Partly Sunny

    • -18
    • -5

    Cold

    • -13
    • -2

    Cold

    • -3
    • 7

    Slight Chance Snow

Today 20 Jan Waukesha

Not as cold. Sunny until late afternoon then becoming partly sunny. Highs around 14. West Winds 5 to 15 Mph.

Tonight 20 Jan Waukesha

Bitterly cold. Mostly clear. Near steady temperature around 1 below. West Winds 5 to 10 Mph. Wind chill Readings 10 below to 20 below zero.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hartland Temperature Statistics

January Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 1 January, 2026

    8.6 °F

  • Average January

    27.6 °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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