倫敦和巴黎的天氣

Hi,

The weather in London is very unstable. It can be windy sometimes and suddenly changes to sunshine. A cloth with windstopper and waterproof is better.

Wind + rain = you can't hold umbrella.

Suggestions:
1. a windstopper and waterproof cloth and a waterproof shoes
2. a warm waterproof hat
3. 羽絨 is not a must but remember that a warm cloth should be worn, which should also be taken off easily.

Actually, in such weather, you will prefer to keep your hands in your warm pockets more. There are heaters in all indoor places. Your "warm" clothes should be able to be taken off easily.

Have a nice trip.

Yes, the weather is rather cold, especially these cities always have drizzles in winter, or sometimes have snow.
You better take enough clothes (waterproof)

Yes, I think the salesman is right. London is very humid, and if you are afraid of the cold weather, I suggest you to wear the down and then wear the water proof jacket.