Sitting on a beautiful valley of Langbiang mountain, Dalat has one of the most stable weather conditions among Vietnam destinations. At 1500m height compared with sea level, Dalat enjoys a cool climate all year round, though the temperature rises slightly during the summer months from May to August and drops to a chilly point at night. Humidity is high, though nothing compared with lowland cities or coastal provinces.
The stable weather means that any time can be an excellent time to visit Dalat. However, try to avoid June-August since this is the peak season for domestic tourism, when city-dwellers from Hanoi and Ho Chi Minh city look for an escape from the heat and household chores. These months are also the period when rain falls the most.