It never cools down in Darwin. Never ever. I am walking around with a bottle of frozen water to be able to cope with the heat. April, that means that we are going towards the dry season which runs from May to September. Darwin has a tropical climate with distinct wet and dry seasons and the average maximum temperature is similar all year round (32 C). During the dry season nearly every day is warm and sunny, and afternoon humidity averages around 30%. It is a bit of a change for the body.