December to February are the wettest months of the year, Darwin has an average annual rainfall of 1729mm which is 1.7 meters of rain. These months are also characterised by extremely high humidity levels (80 - 100 %), monsoonal rains and spectacular storms. Temperatures are high with an average low of 25C (77F) and average high of 33C (91F). 

September to November are known as the build up and are the months that transition into the wet season, these months can also be some of the best for birding. The birds are usually easier to find as they usually congregate around remnant watering holes and October and November are usually the months birds start to breed and are very active. Humidity and Temperatures are usually quite high but usually tolerable.