June in Sankt Gallen averages a daily high of 7.5°C with nights around 2.5°C. Expect roughly 18.4 wet days totalling 235.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Sankt Gallen is June–August.
Based on SAENTIS, SZ (19.4km), 1995–2024. 30 years of June data.