Weather will likely play an important role when you plan your trip to Dehiatteyaya, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March, with an average temperature of 20°C, while the coldest months are January and February, with an average of 18°C. The rainiest months in Dehiatteyaya are October, November, May and April, with each month seeing an average of 440 mm of rainfall.