Weather is probably a major factor when you plan your trip to Wau, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually December and February, with an average temperature of 20°C, while the coldest months are September and July, with an average of 19°C. The rainiest months in Wau are September, June, August and July, with each month seeing an average of 698 mm of rainfall.