What is the best time to visit Lijiang? Is Jun a good time to visit as I plan to go in Jun?

It is OK to visit the city during June. It is wet with plenty of rainfall in June. The weather is so temperamental that the temperature can drop down much after the rain. Except for short-sleeved T-shirts and shorts, it's also advisable to take some warm clothes like a thin overcoat and long pants plus an umbrella or rain gear.