December in Eau Claire averages a daily high of -0.9°C with nights around -8.1°C. Expect roughly 10.1 wet days totalling 40.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Eau Claire is May–September.
Based on EAU CLAIRE 3 SW, WI US (3km), 1995–2024. 14 years of December data.