Hartland Weather Forecast

    • 25
    • 42

    Mostly Cloudy

    • 32
    • 40

    Mostly Cloudy

    • 36
    • 39

    Rain Likely

    • 33
    • 44

    Cloudy

    • 20
    • 44

    Mostly Cloudy

    • 9
    • 27

    Mostly Cloudy

Today 23 Dec Waukesha

Partly sunny. Highs in the lower 40s. West Winds 5 to 10 Mph.

Tonight 23 Dec Waukesha

Not as cold. Mostly cloudy after midnight then becoming partly cloudy. Slight chance of drizzle after midnight. Near steady temperature in the mid 30s. Southwest Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Hartland Temperature Statistics

December Temperature

Waukesha County Airport (6.2 miles)

  • Lowest 14 December, 2025

    -5.8 °F

  • Average December

    20 °F

  • Highest 18 December, 2025

    46.4 °F

Climate (2020–Present)

Waukesha County Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    38.3 °F

  • Average 2020–2025

    45.8 °F

  • Average High 2020–2025

    56.3 °F
Get WillyWeather+ to remove ads