Spring (March–May) offers mild temperatures, generally clear skies, and fewer crowds than summer. Autumn (Mid-September–Early November) has pleasant weather, beautiful foliage colours, and crowds begin to thin after the summer peak. Summer (June–August), on the other hand, has the warmest weather with long daylight, but also the busiest period with the largest crowds and potential for haze. During winter (December–February), expect a colder, but clear, crisp winter day that can offer excellent visibility, especially with London's festive lights around Christmas.