Overview: SouthamptonSouthampton (United Kingdom) is a place with a mild climate. Temperatures during the day are in the range from 9 °C (48 °F) in February to 23 °C (73 °F) in July. The driest month is July with just 8 days of rain, on the contrary, the month when it rains the most is January with 13 days of rain. Temperatures during the night go from 3 °C (37 °F) in February to 13 °C (56 °F) in July.