Weather will likely play an important role when you plan your trip to Kokoda, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and November, with an average temperature of 25°C, while the coldest months are September and August, with an average of 24°C. The rainiest months in Kokoda are March, February, January and December, with each month seeing an average of 550 mm of rainfall.