Do I need to bring a snow chain to drive to Siguniang Mountain in July and August?

No need. Cars in Siguniang Scenic Area can't enter, only cars in the scenic area can enter. July and August belong to midsummer, there is no snow, and there is no need to wear snow chains. There are more than 7 kilometers behind, so you can only walk by yourself. If you can't return to the gate on the same day, you need to report in advance to buy tickets in the scenic spot.