Indonesia has an almost entirely tropical climate with small temperature differences through the year, but strong contrasts in rainfall and altitude. Coastal and lowland areas are generally hot and humid, while highland areas are cooler and often wetter. Most of the country has a clear wet season and dry season, though parts of western Indonesia can remain rainy for much of the year. For residents and expats, climate comfort depends heavily on location: upland cities are usually more pleasant than low-lying coastal areas, and the drier south-eastern islands offer more sunshine but longer dry spells. Indonesia is geographically large and climatically diverse, so conditions vary widely across its islands.