Weather in London in August 2025
- August is usually the hottest month of the year in London;
Average weather
Average temperature in London in August
Going from a maximum of +82°F during the day to a minimum of +52°F during the night, the temperature in August averages around +72°F.
The average maximum temperature goes down 35% by the end of the month, compared with the beginning of the month, from +73°F to +63°F.
Is London warm or cold in August?
London is typically mild in August.
Maximum temperatures go up compared to the previous month from +72°F to +72°F. The minimum temperature also goes up from +57°F to +57°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is the hottest month in London, here is the comparison with other months:
Travel to London
Climate in London in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +72°F | +72°F | +66°F | ||||
| Min. temperature | ||||||
| +46°F | +45°F | +37°F | ||||
| Max. temperature | ||||||
| +102°F | +99°F | +90°F | ||||
| Rainfall | ||||||
| 54 mm | 58 mm | 47 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 68% | 70% | 74% | ||||
| Air pressure | ||||||
| 1015 HPa | 1014 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 5 | 5 | 4 | ||||
| Cloudy days | ||||||
| 8 | 9 | 11 | ||||
| Rainy days | ||||||
| 16 | 16 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +72°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 54 mm to 58 mm. Humidity rises from 68% to 70%. The average wind speed doesn’t change much during August, staying around 3 m/s. The amount of sunny days stay about the same, averaging 5 sunny days during the month.
September brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in London is gradually decreasing during August, going from 5 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in London?
Climate Change Over the Years
The climate in London in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1979 (+54°F) and the highest in 2022 (+62°F). The driest year was 1996 with only 431 mm of rainfall, and the wettest year was 2021 with 1037 mm.
FAQ
Is August a good time to visit London?
Can you sunbathe in London in August?
Is London rainy in August?
Is it sunny in London in August?
How much does it cost to fly to London in August?
Other cities in United Kingdom
Monthly weather in London
Source of the data
For this page, we’ve looked at the typical weather in London, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.