Newhaven Weather in September

September in Newhaven brings pleasant temperatures around 19°C (66°F) during the day, dropping to 14°C (57°F) at night, with quite a bit of rainfall expected, averaging around 74 mm (2.9 in) for the month.

Rainfall in Newhaven in September

Expect around 12 days of rain based on historical data, with 74 mm (2.9 in) average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Newhaven in September

In September, expect pleasant temperatures in Newhaven, with highs of 19°C (66°F) and lows of 14°C (57°F) at night. Summer occurs in September. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Average water temperature in September

With water at 18°C (64°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

Should you favor a climate that's both dry and comfortably warm, August typically offers 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.