January in Karlskrona averages a daily high of 3.2°C with nights around -0.2°C. Expect roughly 13.9 wet days totalling 35.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Karlskrona is June–September.
Based on KARLSKRONA SODERSTJ., SW (1.3km), 1995–2024. 14 years of January data.