January in Sankt Augustin averages a daily high of 5.5°C with nights around 0.4°C. Expect roughly 15.2 wet days totalling 57.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Sankt Augustin is May–September.
Based on BONN ROLEBER, GM (4.3km), 1995–2024. 24 years of January data.