21 Day Weather Forecast London
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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Leeds Wire weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows London’s conditions over the next three weeks, with a mix of mild spells and cooler, wetter intervals typical for a UK spring. Expect temperatures mostly between 8°C and 15°C, with occasional frost possible overnight.
Will it be a settled three weeks for London?
The outlook suggests no prolonged dry period. High pressure may bring a few dry, bright days early on, but Atlantic weather systems are likely to push in later, bringing rain and stronger winds. The second week looks particularly changeable.
How accurate is a 21-day forecast for London?
Reliability drops significantly beyond 7–10 days. The Met Office rates its 21-day outlook as a “trend” rather than a detailed prediction. For daily planning, check the live forecast above and use the 5-day updates from the BBC or Met Office. The 28 day weather forecast London data often shows a similar pattern.
What is the 21 day weather forecast London Met Office?
The Met Office provides a 21-day outlook as a broad trend, not a daily forecast. It shows likely pressure patterns and general conditions, updated twice daily. For hour-by-hour accuracy, use the 21 day weather forecast London hourly data from the live feed above.
How does the bbc weather London 15 day forecast compare?
The BBC’s 15-day forecast offers more granular detail than a 21-day outlook, with daily highs, lows and rain probability. It is updated every few hours. For a longer view, the weather London 14 days and 21-day trends are best used together.
Where can I see a 21 day weather forecast London AccuWeather?
AccuWeather provides a 21-day forecast with hourly breakdowns for the first week. Their “MinuteCast” gives minute-by-minute rain predictions. However, for official UK data, the Met Office or live forecast above is more reliable for longer-range planning.
For other UK cities, see our UK weather hub or check Bristol Weather and Glasgow Weather for regional comparisons. For a shorter view, visit 10 Day Weather Forecast UK.
