Well... what are you used to? I assume you come from somewhere warmer.
February tends to be the coldest and most miserable month for weather so it's all upwards from here! A good warm coat, and sweaters and sweatshirts, will be helpful. It's actually quite a mild winter so far but that's by OUR standards. It hasn't snowed in London yet except for a couple of mornings where some fluttered down but it melted and didn't settle on the ground. Snow is rare in London so it always causes chaos on the public transport when we get it. The average daytime temperature in London is around 5-8 degrees C for now, so it's cold but not freezing. The Arctic it ain't!
If you're coming from North America, flights generally go overnight and arrive around breakfast time as trailblazer says, so a packing tip would be to wear the warm coat and then it won't be taking up a lot of space in your luggage ;) If you arrive at Heathrow, it's very likely that the plane can't park next to the terminal so they have to ferry you there by bus, and then you'll be all ready for that blast of cold air!
Experiment with layers of clothes - always a good move in case the temperature suddenly changes and you feel like stripping some off. Be prepared for it to rain at any time, though in fact London is less wet than people love to say it is. It's just that the nature of our island weather makes weather forecasts unreliable. I haven't taken any notice of them for years except to take note of if there's a storm coming - once in a blue moon a North Atlantic hurricane misses the USA, travels up the east coast, back across the Atlantic and we get it, but by then it's mostly blown itself out and we just get a day of high winds. LOL I remember the "Great Storm" of 1987, which a BBC weather forecaster got famously wrong and he's never been allowed to forget it. I got sent home from work because of that - I got there but they couldn't open the office. But that was a definite one-off.
You might feel the need for gloves, warm socks and a hat that covers your ears - a coat with a hood will solve that last one. It's always the extremities that feel the cold - fingers, toes and ears. I haven't felt the need for any of that this winter, but then I live here!
Anyway, if once you get here you realise your packing missed the mark, we DO have shops! (As the late English humorist Keith Waterhouse wrote in "The Theory and Practice of Travel", there is no need to overpack when you go away for a week or two - they sell clothes there too!) So go out and explore your local area, and if shopping bores you (it does me - typical male!), a department store to look out for is Marks & Spencer. Not the cheapest but not the most expensive either, good quality, and it will sell you just about anything you need to be warm in.
Pack for winter, we are in the middle of a cold snap, but it could turn and bad warmer, and then get colder again. Do not make the mistake of not taking a good coat with you on the flight here, as often they arrive early morning at it will be very cold then.
It is never quite as cold as your average Brit would have you believe, for some reason we like to tell everybody our weather is so bad you would think we were living in the Antarctic .
Our current weather is typical of February .and is therefore quite cold with temperatures dropping to about -5 during the night and daytime temperatures of about 4 degrees.
It's not that cold, we've had colder winters than this.
It's not cold all the time in the UK, nor does it rain all the time and it's rarely foggy. You need to bring clothes suitable for all temperatures and weather conditions.
Its bloomin cold at the moment. A coat, scarf hat and gloves are essential, and layers underneath.
Have you got a job or school to go to in England? Do you have a student or work visa which you need if you are not from a European Union country
layers.
they keep shops and individuals houses at "oven heat" so you need to be able to remove layers.
