Heathrow Weather in September

September is one of the perfect months to visit Heathrow, with daytime temperatures of 20°C (68°F) and lows of 11°C (52°F) at night. Some rainfall is typical for this time of year.

Rainfall in Heathrow 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. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Heathrow in September

The perfect temperature in Heathrow in September makes it a solid month to visit, with 20°C (68°F) during the day and 11°C (52°F) at night. Conditions are often most pleasant around the middle of the day. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Heathrow in September

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

Wind Speed in Heathrow 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.

If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Heathrow.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Heathrow's climate page.

Heathrow Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 40%  

Precipitation 54 mm (2.1 in)  

Rainy days 12 days  

Humidity 73% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 155 hours *  

Percentage Sunshine 40% *  

What to Wear in Heathrow in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Heathrow in September

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

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Heathrow's climate page.

More climate data for Heathrow

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Heathrow climate overview or explore weather in the United Kingdom.