Overview: HuancayoHuancayo (Peru) in general has a hot climate. The day temperatures range from 17 °C (63 °F) in February to 19 °C (67 °F) in August. The highest night temperatures could be experienced in February with 6 °C (43 °F), the lowest in June with 0 °C (32 °F). The driest month is June with just 1 day of rain, on the contrary, the month when it rains the most is January with 12 days of rain.