There are good (and bad!) things about London at any time of year.
I think for most people the best way to have a good time, whenever you visit, is to avoid crowds, much the same as for any big city:
- try not to travel at rush hour -- the worst of it lasts from around 7:30 to 9:30 in the morning, 5:00 until 7:00 in the evening
- places like galleries and shopping centres are best visited during the week rather than at the weekend
- Thursdays and Fridays, especially in the evening, can be much busier than the other weekdays
- mornings in central London (until about 12:00) can be surprisingly un-busy -- if you want to go shopping or see something that you think will be busy (like an exhibition) get there first thing, and plan your day to be somewhere less busy by lunchtime
- Oxford Street and other shopping areas are very busy before and just after Christmas
- the Tube is generally a surprisingly friendly place, but it can get very hot and overwhelming when it's crowded in mid-summer
- there are more tourists in summer (especially August) but, of course, they tend to stick to the main attractions (around Oxford St, the Tate Modern, etc.)
- school holidays (look on the web for dates) make some places much busier, so avoid those dates if you can
Some of my personal seasonal favourites in London:
- central London on Christmas or Boxing Day -- places like Horse Guards Parade, and around Trafalgar Square
- spring walks in Hyde Park
- summer picnics in Richmond or Battersea Park
- snow on any of the parks or commons
- cycling along the Thames any time it's sunny
- chilly early mornings in autumn in central London when it's grey and damp when most people are still at home
- long evenings in mid-summer -- often still light until about 10:00 over 9 years ago
Great advice from Sam Dutton.
London is a year round destination with pros and cons for coming at different times. The seasons are well marked and it will be cold, wet, snowing, icy around December - February; wet but with some nice days from March - May; warmer heading to summer from May - August; then September - October is autumn and finally back into winter.
When the weather is bad - especially snow or a lot of rain - then public transport and the road network in central London tends to grind to a halt. over 9 years ago
If the weather is not a consideration, then there is no good or bad time to visit London as attractions are mostly open all year round. However, many travelers believe that summer is the best time to travel to London because at these days we can easily find some cheap accommodation to live in and enjoy all other facilities too. From May through September in London, the weather is almost always warm and dry, all the attractions are open for the maximum number of hours, and all the hotels and short term rental accommodations provided by some good firms like http://www.plazaestates.co.uk/properties-to-rent-in-pimilico are accepting guests too. over 7 years ago
Spring, Summer or Fall, but obviously you can get cooler, rainier temperatures any time of the year here. Sometimes winter isn't bad b/c it's mild, but if they get even a bit of snow, it seems as if the whole city shuts down, including flights, so something to consider. But overall it's an amazing city with tons to do regardless of weather. about 7 years ago
It's great all year round but I prefer to travel Spring - Summer. You see you don't want to worry too much about the cold when you're sightseeing. :) Plus There's lot's of things happenning during summer and spring, Wimbledon, City Of London Festival, London Marathon etc. about 7 years ago