Planning for the weather is an important factor for making your trip to Huancayo a success, especially when you're splurging. The hottest months are usually October and November, with an average temperature of 10°C, while the coldest months are July and June, with an average of 9°C. The rainiest months in Huancayo are February, January, December and March, with each month seeing an average of 207 mm of rainfall.