June in Southampton averages a daily high of 20.4°C with nights around 10.3°C. Expect roughly 9.9 wet days totalling 52.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Southampton is June–September.
Based on HURN, UK (33.2km), 1995–2024. 30 years of June data.