January in Appleton averages a daily high of -3.4°C with nights around -11.4°C. Expect roughly 9.2 wet days totalling 34.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Appleton is May–September.
Based on APPLETON, WI US (2.4km), 1995–2024. 29 years of January data.