Southampton - Five-Day Weather ForecastSouthampton ClimateBritish weather is rarely extreme, monthly rainfall is between two and four inches (50 and 100 millimetres), snow is infrequent and the temperature seldom dips below freezing. Southampton has a temperate climate with only slight temperature variations between day and night, summer and winter. The average for January is 5 degrees Celsius (40 degrees Fahrenheit) and 18 degrees Celsius (68 degrees Fahrenheit) for July. The best time to visit is between April and September, when the days are longer, staying light until after 10:00 pm in late June.
Southampton Climate Chart