London, United Kingdom

If you're planning a long-weekend city trip, London deserves a close look. This United Kingdom destination lies under maritime skies, and its climate record peaks at a 93/100 sun score in June — 21°C afternoons under 62% average cloud cover.

Across a typical year, afternoon temperatures swing between 8°C (January) and 23°C (July). On the rain ledger, August is the safest bet at a 26% chance of a wet day, while March climbs to 40%. No month averages 24°C highs, so this is a destination for light-jacket sunshine rather than beach heat.

The seasonal arc is clear in the data: summer averages 22°C against winter's 9°C, while rain-day odds move from 37% in winter and 34% in spring to 31% in summer and 38% through autumn. Summer wins on the numbers and winter loses them; everything in between is a trade-off between warmth and crowds.

Best months to visit London

The best month on record is June — a 93/100 sun score, built on 62% cloud cover and 34% rain-day odds — followed by July and August. In practice you have flexibility — May–September all stay above a 70 sun score. The month to avoid on pure weather odds is December (42/100).

Among the ocean destinations in our catalog, its June rain odds beat 51% of the field.

Month-by-month breakdown for London → · More destinations for June →

Right now the 14-day outlook shows 3 mostly-clear days (under 40% cloud) and none with real rain risk, with temperatures between 5°C and 17°C — which is how London earns its current 49/100 sun score.