Weather is probably a major factor when you plan your trip to Kakadu, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and November, with an average temperature of 29°C, while the coldest months are July and August, with an average of 26°C. The rainiest months in Kakadu are January, February, December and March, with each month seeing an average of 327 mm of rainfall.