Weather in Mt. Nemrut in Oct

1. We are planning to go to Mount Nemrut for the ancient statues in late September near October. I am a bit worrying about the weather as I have seen reviewers saying snow been seen in May... Is visiting the status advisable in October?

2. Which route: from Malatya or Adıyaman shall be taken if we are to drive for the visit? Is travelling from Malatya more susceptible to road closure due to bad weather?

Thank you