5-day weather forecast London Sep 21, 2026
Weather forecast London tomorrow Sep 21, 2026: sunny, temperature from 13 °C to 23 °C.
Precipitation probability 12%. Wind up to 2 m/s (gusts 2.94 m/s). Air humidity 30–59%, atmospheric pressure 773–775 mm Hg, UV index up to 3.9.
5 days at a glance — tap a day to open it
Sunrise 06:45
Sunset 19:01
Sunset 19:01
Waxing Gibbous82% illuminated
Moonrise 17:25 · Moonset 00:38
Moonrise 17:25 · Moonset 00:38
Chart
TableForecast from 13 °C to 23 °C and precipitation
Cloud cover and precipitation probability
Wind speed and direction
Air humidity
Atmospheric pressure
Ultraviolet index
Air quality & pollen
London on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.