🇬🇧 Weather in London in August
This is what the weather in London (United Kingdom) was like in August in 2017–2026.
Key facts at a glance
Avg. daytime high
23.7 °C
21.3 °C – 27.1 °C
Avg. night-time low
13.1 °C
11.7 °C – 14.5 °C
Avg. rain days in period
9.9
32 % of days · ≥ 1.0 mm
Avg. precipitation in period
50.6 mm
18.8 mm – 73.7 mm
Avg. sunshine per day
n/a
Sunshine duration is not available from this data source.
Avg. sea temperature
–
No sea nearby – no sea temperature.
Extremes: Highest temperature 36.3 °C (13 Aug 2026) · Lowest temperature 7.3 °C (11 Aug 2018) · Avg. daily peak wind 23 km/h
Weather mix of all days
- 15Sunny
- 89Partly cloudy
- 83Cloudy
- 65Light rain
- 34Rain
Summary
- On average 23.7 °C during the day and 13.1 °C at night.
- On average 9.9 rain days (Rain day = at least 1.0 mm of precipitation) with 50.6 mm of precipitation in total.
- Prevailing: Partly cloudy.
- Warmest year: 2026 (avg. 27.1 °C), coolest: 2021 (avg. 21.3 °C).
- Wettest year: 2017 (73.7 mm), driest: 2025 (18.8 mm).
- Extremes: 36.3 °C on 13 Aug 2026 and 7.3 °C on 11 Aug 2018.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Precipitation & rain days
Year by year
2026
Avg. max27.1°Avg. min14.5°- Rain days
- 7 Rain days
- Precipitation
- 26.8 mm
- Avg. sunshine per day
- n/a
- Sea temperature
- –
Max 36.3 °C · Min 10.4 °C
2025
Avg. max24.4°Avg. min12.7°- Rain days
- 5 Rain days
- Precipitation
- 18.8 mm
- Avg. cloud cover
- 63 % cloudy
- Sea temperature
- –
Max 30.9 °C · Min 9.1 °C
2024
Avg. max23.5°Avg. min12.8°- Rain days
- 11 Rain days
- Precipitation
- 52.3 mm
- Avg. cloud cover
- 65 % cloudy
- Sea temperature
- –
Max 29.9 °C · Min 9.6 °C
2023
Avg. max22.4°Avg. min12.3°- Rain days
- 15 Rain days
- Precipitation
- 68.0 mm
- Avg. cloud cover
- 70 % cloudy
- Sea temperature
- –
Max 26.7 °C · Min 9.1 °C
2022
Avg. max26.3°Avg. min14.4°- Rain days
- 5 Rain days
- Precipitation
- 32.5 mm
- Avg. cloud cover
- 58 % cloudy
- Sea temperature
- –
Max 32.5 °C · Min 9.5 °C
2021
Avg. max21.3°Avg. min12.2°- Rain days
- 9 Rain days
- Precipitation
- 44.4 mm
- Avg. cloud cover
- 76 % cloudy
- Sea temperature
- –
Max 23.5 °C · Min 9.2 °C
2020
Avg. max24.2°Avg. min14.5°- Rain days
- 13 Rain days
- Precipitation
- 72.0 mm
- Avg. cloud cover
- 75 % cloudy
- Sea temperature
- –
Max 32.8 °C · Min 8.2 °C
2019
Avg. max23.3°Avg. min13.0°- Rain days
- 12 Rain days
- Precipitation
- 43.6 mm
- Avg. cloud cover
- 66 % cloudy
- Sea temperature
- –
Max 30.9 °C · Min 9.1 °C
2018
Avg. max23.3°Avg. min12.6°- Rain days
- 11 Rain days
- Precipitation
- 73.4 mm
- Avg. cloud cover
- 66 % cloudy
- Sea temperature
- –
Max 31.3 °C · Min 7.3 °C
2017
Avg. max21.6°Avg. min11.7°- Rain days
- 11 Rain days
- Precipitation
- 73.7 mm
- Avg. cloud cover
- 73 % cloudy
- Sea temperature
- –
Max 26.4 °C · Min 7.5 °C
Frequently asked questions
- How warm is it in London in August?
- Daytime highs averaged 23.7 °C, night-time lows 13.1 °C. The highest value of the past 10 years was 36.3 °C (13 Aug 2026), the lowest 7.3 °C (11 Aug 2018).
- How often does it rain in London in August?
- On average there were 9.9 rain days (at least 1 mm) with 50.6 mm of precipitation in total.
Check your exact travel dates
Choose your travel period – we show the weather for exactly those days.
Other destinations in August
Data sources
- Weather data
- Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains. - Sea temperature
- MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis) - Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)