Sussex Weather in September

September in Sussex brings pleasant temperatures, with daytime highs of 20°C (68°F) and nights around 9°C (48°F). Quite a bit of rainfall is expected, around 102 mm (4 in), so pack an umbrella.

Rainfall in Sussex in September

Typically around 10 days of rainfall are expected, averaging 102 mm (4 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Sussex in September

Expect highs of 20°C (68°F) in Sussex in September, with nights dropping to around 9°C (48°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Sussex in September

The area enjoys a moderate level of sunlight, with around 173 hours. It's a good balance between sunny and cloudy days.

Should you favor a climate that's both dry and comfortably warm, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.