London Weather in September

September in London sees daytime temperatures around 20°C (68°F) and lows of 11°C (52°F) at night. The excellent weather makes it a good time to visit.

Rainfall in London in September

Looking at the last 30 years, the data shows about 12 days with rain, averaging 54 mm (2.1 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in London in September

September tends to be one of the excellent months in London, with 20°C (68°F) in the afternoon and 11°C (52°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to around 11°C (52°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.

Sunshine in London in September

With about 155 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Wind Speed in London in September

September has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for London.