Weather will likely play an important role when you plan your trip to Nilanga, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and April, with an average temperature of 31°C, while the coldest months are December and January, with an average of 24°C. The rainiest months in Nilanga are July, September, August and June, with each month seeing an average of 218 mm of rainfall.