January in Milwaukee averages a daily high of -0.9°C with nights around -8°C. Expect roughly 11.2 wet days totalling 45.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Milwaukee is June–September.
Based on MILWAUKEE MITCHELL AIRPORT, WI US (9.3km), 1995–2024. 30 years of January data.