Heathrow weather in September (United Kingdom)

Curious about the climate in Heathrow this September? Find all the essential weather information for this month in our guide.

Temperatures

During September, Heathrow experiences perfect weather, with pleasant temperatures and moderate rainfall. Expect daytime highs to reach approximately 20°C, with nighttime lows dipping to around 11°C.

Precipitation

Heathrow in September usually receives moderate rainfall, averaging around 54 mm for the month. Expect around 12 days of rain based on historical data.

Average sunshine

The month brings about 155 hours of sunlight, offering a comfortable mix of sun and shade.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Heathrow. June, July, August and September typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.

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

 

Heathrow, 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 Heathrow, 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 Heathrow.

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.