January in Madison averages a daily high of -2.1°C with nights around -11.7°C. Expect roughly 8.2 wet days totalling 40.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Madison is June–September.
Based on UW ARBORETUM MADISON, WI US (4.2km), 1995–2024. 29 years of January data.