McConville Lake Weather Forecast
- 57
- 67
Rain Showers
- 56
- 66
Rain Showers
- 51
- 64
Chance Rain Showers
- 48
- 60
Chance Rain Showers
- 48
- 59
Partly Sunny
- 48
- 63
Mostly Cloudy
Today 18 Sep Washington
Partly sunny until late afternoon then becoming cloudy. A 30 percent chance of light rain Showers late in the afternoon. Highs in the upper 60s. East Winds 5 to 10 Mph.
Tonight 18 Sep Washington
Chance of light rain Showers in the Evening, then rain Showers in the late evening and overnight. Chance of Thunderstorms after midnight. Lows in the mid 50s. East Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight. Chance of precipitation near 100 percent.
McConville Lake Temperature Statistics
September Temperature
Waukesha County Airport (13.7 miles)
Lowest 14 September, 2026
46.4 °FAverage September
68.6 °FHighest 1 September, 2026
87.8 °F
Climate (2021–2026)
Waukesha County Airport (13.7 miles)
Average Low 2021–2026
38.8 °FAverage 2021–2026
46.2 °FAverage High 2021–2026
56.6 °F