What's the weather like in San Francisco all year round? I'm going to the boarding middle school there. What clothes should I bring (afraid of cold) and how much?

The weather in San Francisco, that is, San Francisco, is very good, and it belongs to a place where the seasons are like spring.

Summer is still short-sleeved, of course, but it's not that hot (but the sun is spicy and it's uncomfortable to get sunburned outside)

Winter is not below zero. Generally, the lowest temperature is above 5 degrees. You don't need a down jacket, just a coat.