London weather in September (Greater London, United Kingdom)

How does the September weather in London compare to other months? Find all the essential weather information for this month in our guide.

Temperatures

The weather in London is usually perfect in September, characterized by pleasant temperatures and moderate rainfall. Daytime temperatures are expected to be around 20°C, cooling off to about 11°C at night.

Precipitation

London in September usually receives moderate rainfall, averaging around 54 mm for the month. Analyzing past climate data, one can expect approximately 12 days of rain.

Average sunshine

The month experiences a moderate amount of sunlight, with 155 hours hours. A nice balance between sunshine and clouds.

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 Temperature 11°C  

Max Temperature 20°C  

Chance of Rain 40%  

Precipitation 54 mm  

Rainy days 12 days  

Humidity 73%  

Windspeed 11 km/h  

Sunshine 155 hours  

Percentage Sunshine 40%  

Where to go in the United Kingdom in September

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

Weather conditions Weather

Temperatures

Precipitation

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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 this month?

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.

Swimming

6/10

Cycling

10/10

Walking

10/10

Barbeque

7/10

Camping

8/10

Outdoor sports

10/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.