The morning should be warm and sunny today, with temperatures starting in the high 70s and peaking in the mid 80s around midday, as well as a few clouds overhead as we approach the afternoon but a very low chance of rain. Humidity up a little bit from yesterday around 77%, but still continuing the overall trend of dropping slowly over the course of the next few weeks. Some stronger winds again today coming almost directly from the north, peaking at almost 10mph around sunset, which should provide a break from the heat and keep the air relatively fresh.
Expect to see this weather becoming the norm as we reach the end of green season and move into the Guanacaste summer, which ranges from the beginning of November all of the way through April. As Costa Rica is located very close to the equator, the changing of the seasons doesn't bring much of a difference in the hours of sunlight or temperatures, but there is a key change in the amount of rainfall (hence why these two seasons are often dubbed the "wet" and "dry" seasons). On average, Costa Rica rain ranges between 150mm a month in the bumper months of May and November, and picks up to almost 400mm a month across the heart of the green season, with rainfall nearly every day. On the other hand, during the summer season rain drops down below 20mm, with some months recording as low as 5mm of rain some years, and seeing weeks of sun in a row without a drop of rain.
It's a very tangible difference, especially in Guanacaste, and it has a number of effects that town will start to see over the next few weeks. Most immediately, town will start to see the whole landscape changing color, from a rich green to a light gold, with foliage thinning as plants discard excess leaves and fronds to conserve water. It's a similar process as the onset of fall in more temperate region, only compressed into the course of a few weeks.
For now, there are only slight visible changes -- a few sparse trees on the peaks of the hills, a few patches of gold almost indistinguishable from the sunlight reflecting off of the forest -- but they will come quickly as we move through November, so keep an eye out.