Based on my experience so far, and from what I can gather from long-term residents, there are basically two seasons here: Hot and Warm. About two weeks ago, I'd say we reverted back to the HOT season. I honestly don't check the weather report very often because it would only be redundant. It is mostly always sunny, doesn't rain very often, and is at least 80 degrees year round. During the Hot season, that number jumps up to the 90's. I am pleased to say though that during the months of January, February and March, the weather was absolutely glorious! While it was still warm during the day, the intensity of the sun felt considerably less and I found that being outside was very pleasant and didn't result in instant sweating!
The mornings, evenings and night even felt cold at times. I do realize that cold is a relative term and when I say cold, it was probably in the 60's. Add a breeze to 60 degrees, and that can feel downright cold to those of us who are used to the intense heat! Going fishing or to the movies at night time even required a light jacket or sweater.
So here we are, smack dab back in the middle of what I think is the start of a 9-month Hot season. Guess that is perfect weather for all the activities gtmo has to offer!