Planning for the weather is a good way to make your trip to Quito relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and September with an average temp of 54°F, while the coldest months are July and August with an average of 54°F. The rainiest months in Quito are April, March, November, and December, with each month seeing an average of 15 inches of rainfall.