London's weather is notoriously unpredictable and often described as mild and temperate. Expect a mix of sunshine, rain, and cloudy skies throughout the year. Summers (June-August) are generally the warmest, with average highs around 22°C (72°F), while winters (December-February) are cool, with average lows around 2°C (36°F). Rain is common in all seasons, so it's always wise to carry an umbrella. Snow is relatively rare, but can occur during the winter months. Overall, London's weather requires a flexible wardrobe and a readiness for anything!