Southampton Weather in September

In Southampton, September brings pleasant daytime temperatures around 21°C (70°F), with nights cooling to 14°C (57°F). Expect quite a bit of rainfall this month.

Rainfall in Southampton in September

Typically, you can expect about 12 days of rain this month, with 115 mm (4.5 in) on average. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Southampton in September

Daytime highs in Southampton in September reach 21°C (70°F), with nights around 14°C (57°F). September marks the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.