Thailand remains tropical and humid for most of the year and overall the best time to visit is between November and February when temperatures are more manageable and rain is less common. There are three main seasons, the cool season (mentioned above) when temperatures in the North are lower for longer, the rainy season from May to October when warm humid air brought from the Indian Ocean causes the south to be wettest (low season and when fewer tourists travel) and the hot season from March to May. There are of course regional variations across the country, however generally there is little difference in temperature across the centre and the south of the country, related to its proximity to the equator.