Plymouth Weather in September

September in Plymouth typically sees daytime highs of 28°C (82°F) and nighttime lows of 18°C (64°F). As the wettest month of the year, expect more rainfall than other months.

Rainfall in Plymouth in September

With the year's heaviest rain occurring this month, it's best to be equipped with a poncho to handle the frequent downpours. Based on our climate data of the past 30 years, about 11 days of rain are anticipated, with 162 mm (6.4 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 Plymouth in September

Daytime temperatures in Plymouth reach 28°C (82°F) in September, dropping to 18°C (64°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 18°C (64°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.

For Plymouth itself, October generally stands out with 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.