London has a temperate oceanic climate, meaning mild temperatures year-round with no real extremes in either direction.

Rain is a near-constant companion — not usually heavy, but frequent and often unexpected.

The city sees around 600mm of rainfall annually, spread fairly evenly across the year, which means an umbrella or packable waterproof is always a sensible addition regardless of season.

Summers are warm but rarely hot, and winters are cold but rarely severe.

Humidity is generally moderate to high, which can make mild temperatures feel cooler than they are — the feels-like temperature in London is often a degree or two lower than the thermometer suggests.