EnglandAverage weather for London in September
It's pleasantly warm in September in London with an average temperature of 20°C. Temperatures this month range from a low of 17°C to a high of 22°C. At night, you can expect temperatures between 9°C and 14°C.
Start of September
The month of September starts in London with mild temps, averaging around 21°C during the day and nights around 13°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid September
By mid-September, daytime temps stay steady at around 21°C, with nights around 13°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in London is around 19°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 44 mm of precipitation, spread over 9 days. The wind speed is around 3 Bft, mostly coming from the South.
London in September |
New York | ||
|---|---|---|---|
 Average temperature |
20°C | 27°C | |
 Max. temperature |
22°C | 31°C | |
| Min. temperature |
17°C | -5°C | |
 Total precipitation |
44 mm | 57 mm | |
| Rainy days |
9 days | 9 days | |
August
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit London?
Looking for great weather? September is a good time to be in London. The temperatures are nice, and there’s not too much rain.
Temperature records
With 33°C in 2016, London reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 20°C.
Check out the climate of London for all months and discover the best travel time
Curious about the weather in other parts of England? Check out the climate and weather for spots like Edinburgh, Cornwall, Devon, or explore other destinations in England.
Daily Temperature in September in London
This chart shows the average daily high and low temperatures in September for London, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Weather experiences in September in London
Good
Surprisingly, there was less rain than expected. Cloud cover... more
Daily Precipitation in September in London
The chart below shows the average daily precipitation in September for London, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 9 days of precipitation in London.
Daily UV index in September in London
This chart shows the average daily UV index in September in London, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in London over the years
This chart shows the average temperature in September in London, measured in degrees Celsius, over the past few years.
Total precipitation in September in London over the years
This chart shows the average precipitation in September in London, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for London
Click on any day in September to get detailed info about the usual weather on that day in London. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in London
The weather in September in London is rated 4 out of 5 stars by 1 visitor. Have you been to London? Share your weather experience to help other visitors.
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Surprisingly, there was less rain than expected. Cloud cover often relieved the oppressive heat. However, an umbrella was required.— This text is automatically translated to English
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Average weather in London by month
Click on a month below to see detailed weather info for London. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
