Weather is probably a major factor when you plan your trip to Bireuen, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and June, with an average temperature of 28°C, while the coldest months are January and February, with an average of 27°C. The rainiest months in Bireuen are December, November, October and January, with each month seeing an average of 283 mm of rainfall.