What is e Weather in Dalian and changbaishan like in Oct.?Will there be snow?

It is a little cool in DL during that time. The temp range shall be 8C to 20C. Prepare leather jacket, thick long-sleeved shirt and jeans. And sunny days would be the majority. While it would be cold at Changbaishan. The temp may fall to -5C. Light rain or snow may happen. It is best to prepare sweater, down jacket and thick pants.