Lake Onalaska Weather Forecast
- 58
- 84
Mostly Cloudy
- 55
- 80
Mostly Cloudy
- 57
- 79
Mostly Cloudy
- 56
- 86
Partly Sunny
- 56
- 84
Partly Sunny
- 59
- 86
Slight Chance Rain Showers
Today 29 May La Crosse
Mostly sunny. Highs in the mid 80s. Southeast Winds around 5 Mph.
Tonight 29 May La Crosse
Mostly cloudy. Lows in the upper 50s. Southeast Winds around 5 Mph.
Lake Onalaska Temperature Statistics
May Temperature
La Crosse - La Crosse Regional Airport (2.5 miles)
Lowest 7 May, 2026
30.7 °FAverage May
59.8 °FHighest 26 May, 2026
90.6 °F
Climate (2021–Present)
La Crosse - La Crosse Regional Airport (2.5 miles)
Average Low 2021–2026
40.9 °FAverage 2021–2026
50.3 °FAverage High 2021–2026
59.9 °F