Weather is probably a major factor when you plan your trip to Waingapu, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually November and October, with an average temperature of 27°C, while the coldest months are August and July, with an average of 26°C. The rainiest months in Waingapu are January, February, March and December, with each month seeing an average of 266 mm of rainfall.