Hartland Weather Forecast

    • 19
    • 22

    Snow Likely

    • 2
    • 26

    Chance Snow

    • 10
    • 16

    Mostly Cloudy

    • 8
    • 21

    Mostly Cloudy

    • 16
    • 23

    Mostly Cloudy

    • 19
    • 30

    Mostly Cloudy

Today 30 Dec Waukesha

Partly sunny until late afternoon then becoming cloudy. A 50 percent chance of light snow in the afternoon. Highs in the mid 20s. West Winds 5 to 15 Mph.

Tonight 30 Dec Waukesha

Not as cold. Mostly cloudy. A 20 percent chance of light snow through around midnight. Lows around 19. West Winds 10 to 15 Mph.

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Hartland Temperature Statistics

December Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 14 December, 2025

    -5.8 °F

  • Average December

    23.8 °F

  • Highest 18 December, 2025

    46.4 °F

Climate (2020–Present)

Waukesha County Airport (6.2 miles)

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  • Average Low 2020–2025

    38.3 °F

  • Average 2020–2025

    45.8 °F

  • Average High 2020–2025

    56.4 °F
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