In England people usually don't talk very much. On a bus or a train, you can see everyone sits there looking out of the window. And they don't talk much. When you meet English people, they often talk about one thing—the weather. So when you meet someone in England, you can say "It's fine today, isn't it?"
"But it was a little cold yesterday. " He may answer.
"Oh, it will be warmer later!" you can say. Talk like this, and the English will think, "How friendly you are!"