What's the weather like in summer in America? What's the weather like in Los Angeles and San Francisco? What should I wear?

It's still very hot in summer in Los Angeles, but you must take your coat at night because of the great temperature difference. Short-sleeved shorts are enough during the day, and a thin long-sleeved coat is enough if it is cold at night. It's a little cold in San Francisco, so you can consider taking a pair of pants. It's not necessary during the day, but you may need it at night. In addition, the sunshine during the day is very strong, so you must use sunscreen, but you won't feel stuffy. It's cool to stand in the shade ... The biggest difference from China is that it won't be sultry, but it's hot in the sun. ...