Planning for the weather is an important factor for making your trip to Mangarakau a success, especially when you’re splurging. The hottest months are usually February and January, with an average temperature of 17°C, while the coldest months are July and August, with an average of 12°C. The rainiest months in Mangarakau are May, June, August and July, with each month seeing an average of 204 mm of rainfall.