Vietnamese here, many people talked about how the tropics have wet and dry season, but didn’t explain why.
The reason is in fact due to the normal four seasons that temperate regions experience. Take a look at [this diagram](https://scijinks.gov/what-is-a-monsoon/monsoon-conditions.jpg) to see how the monsoon air current flows. When it’s summer in the north, the circular flow results in moist air blown into land from the sea, resulting in rain season in the tropics. Vice versa, the tropics experience dry season during winter.
Short answer: indeed, near the equator there are no seasons in the sense that we have them in Europe or North America.
However, there can be other seasonal effects, which are a result of the fact that the land masses are not equally distributed over the planet. For example, when it is summer (=hot) over a large area of water (=ocean) then there is more evaporated water (=clouds) in the atmosphere than when it is hot over a dry land mass. If you live in the area where these clouds typically drift to, you will experience a “rain season”, whereas the time when this isn’t the case will be a “dry season”. Ask people, e.g. living in India what that means 🙂
In relaity it is a bit more complicated, as different heating patterns can also change the wind directions, etc. but in general, this is about it.
Excuse the length of day stays consistent, you won’t get the same hot/cold seasons you get in northern and southern latitudes.
What you will see though are other seasonal changes – primarily wet/dry seasons.
This can happen because weather patterns are BIG. So the fact that it is winter and cold in the North Pacific will alter things like the wind strengths and patterns, or the amount of moisture carried in the air, which will then travel down to the more Equatorial regions (being directed, deflected and altered by the intervening landmasses and currents) and alter the weather patterns seasonally there.
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