Planning for the weather is a good way to make your trip to Ohakune relaxing and enjoyable, especially when you’re splurging. The hottest months are usually January and February, with an average temperature of 7°C, while the coldest months are July and August, with an average of -1°C. The rainiest months in Ohakune are September, October, July and May, with each month seeing an average of 198 mm of rainfall.