with two main seasons: the dry season and the rain season. The 'build up' describes the change between the dry and the rain. During the dry season (from April/May to September), there are dry southerly and easterly trade winds. Humidity is relatively low and rain is unusual. At Jabiru, the average maximum temperature for June-July is 32 °C. During the 'build up' (October to December) conditions can be extremely uncomfortable with high temperatures and high humidity. However, 'build up' storms are impressive and with many lightning strikes. At Jabiru the average maximum temperature for October is 37.5 °C.