Hartland Weather Forecast
- 43
- 73
Becoming Sunny
- 50
- 70
Mostly Sunny
- 60
- 78
Rain Showers Likely
- 47
- 73
Rain Showers Likely
- 42
- 66
Partly Sunny
- 46
- 63
Chance Rain Showers
- 45
- 62
Chance Rain Showers
Today 21 Apr Waukesha
Sunny. West Winds 5 to 10 Mph.
Tonight 21 Apr Waukesha
Mostly clear. Lows in the lower 40s. Northwest Winds up to 5 Mph shifting to the northeast around 5 Mph after midnight.
Hartland Temperature Statistics
April Temperature
Waukesha County Airport (6.2 miles)
Lowest 7 April, 2026
23 °FAverage April
45.9 °FHighest 17 April, 2026
77 °F
Climate (2021–Present)
Waukesha County Airport (6.2 miles)
Average Low 2021–2026
38.5 °FAverage 2021–2026
46 °FAverage High 2021–2026
56.6 °F