December in La Crosse averages a daily high of -1.9°C with nights around -9°C. Expect roughly 10.6 wet days totalling 43.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit La Crosse is June–September.
Based on LA CROSSE WEATHER FORECAST OFFICE, WI US (4.5km), 1995–2024. 25 years of December data.