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 temperature of 12°C, while the coldest months are July and August, with an average of 12°C. The rainiest months in Quito are April, March, November and December, with each month seeing an average of 368 mm of rainfall.