Taking the local weather in Andes into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually August and September, with an average temperature of 18°C, while the coldest months are July and August, with an average of 18°C. The rainiest months in Andes are May, April, October and November, with each month seeing an average of 534 mm of rainfall.