Planning for the weather is a good way to make your trip to Huánuco relaxing and enjoyable, especially when you're splurging. The hottest months are usually November and October, with an average temperature of 14°C, while the coldest months are July and August, with an average of 13°C. The rainiest months in Huánuco are February, January, March and December, with each month seeing an average of 352 mm of rainfall.