London weather in September (Greater London, United Kingdom)

Looking to travel to London in September? Here's what the weather might have in store during this month.

In London, September is characterized by pleasant temperatures and moderate rainfall. Daytime temperatures hover around 20°C, while nights can cool down to about 11°C.

London in September usually receives moderate rainfall, averaging around 54 mm for the month. Rain is expected on roughly 12 days.

The area enjoys a balanced 155 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. June, July, August and September generally stand out with the best circumstances. While January, February and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized London climate page with graphs.

 

London, monthly averages in September

Min TemperatureMin Temperature 11°C  
Max TemperatureMax Temperature 20°C  
Chance of RainChance of Rain 40%  
PrecipitationPrecipitation 54 mm  
Rainy daysRainy days 12 days  
HumidityHumidity 73%  
WindspeedWindspeed 11 km/h  
SunshineSunshine 155 hours  
Percentage SunshinePercentage Sunshine 40%  

Where to go in the United Kingdom in September

Find out more about the weather in the United Kingdom in September and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in London in September?

For visitors traveling to London, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming
6/10
Cycling
10/10
Walking
10/10
Barbeque
7/10
Camping
8/10
Outdoor sports
10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in London.

Our site offers climate and forecast data for every country in the world. Are you going to the United Kingdom? On this website you can find historical weather averages for many cities in the United Kingdom. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.