Greenbrier Weather Forecast
- 45
- 55
Mostly Cloudy
- 49
- 64
Rain Showers
- 44
- 61
Mostly Cloudy
- 38
- 57
Partly Sunny
- 37
- 56
Mostly Cloudy
- 36
- 55
Partly Sunny
Today 26 Apr Waukesha
Partly sunny. Near steady temperature in the mid 50s. East Winds 5 to 10 Mph.
Tonight 26 Apr Waukesha
Mostly cloudy. Lows in the mid 40s. East Winds 5 to 15 Mph.
Greenbrier Temperature Statistics
April Temperature
Waukesha County Airport (5.6 miles)
Lowest 7 April, 2026
23 °FAverage April
45.9 °FHighest 17 April, 2026
77 °F
Climate (2021–Present)
Waukesha County Airport (5.6 miles)
Average Low 2021–2026
38.5 °FAverage 2021–2026
46 °FAverage High 2021–2026
56.6 °F