The best time to visit Danang is from February to May, when the skies are sunnier and humidity levels lower. The summer months of June through August can get uncomfortably hot and sticky with temperatures of 33-34°C. It can also get crowded during these months since this is the time of year that sees a lot of domestic travel.
If you're visiting in the months of September to December expect to see a lot of rain (500-1000mm per month), so be sure to pack an umbrella.