Seasons in the Galapagos have become less predictable in recent years, but December to May is generally considered the hot season and June to November the cooler season. In reality, throughout the year there are very agreeable temperatures in the islands, from the low 70s to the mid-80s.
During the warmer months, the average temperature during the day is in the high 70s or low 80s, and the water temperature is from 76-83 degrees. The skies are generally clear, with sporadic rain and calmer seas.
From May to December the air temperatures are slightly lower, with the average temperature in the low to mid 70s. There can also be a mist in the air called the “garua,” and the ocean can be slightly choppier, though it rarely gets very rough in the Galapagos at any time of year. The colder Humboldt Current predominates and water temperatures drop to an average of 65-72 degrees. Again, please note that these historical patterns have become much less predictable in recent years!
Ecuador is located directly on the Equator, but Quito, the capital, is located at an elevation of 9000 feet, and enjoys a spring-like climate for most of the year. The average daytime temperature in Quito throughout the year is about 67 degrees. It gets down to about 50 degrees at night. From October to May you can expect some precipitation, usually in the form of an afternoon shower, after which it clears up. The plus side of the rain is that this is the time when the Andes are greenest. From June to September it is drier, and in June and July in Quito you can expect it to be fairly windy and a bit cooler.
In the Amazon or Eastern cloud forest regions of Ecuador, you can expect some rain for at least part of the day all year round (it’s a rainforest after all). From March to October you can expect a bit more rain than usual in the Amazon, but travel to the region is still common during this period.