Expats relocating to Bangkok should take note that this is one of the hottest cities in the world. With a hot, tropical climate, daytime temperatures are commonly above 30°C (86°F) throughout the year with November to February being the driest time of year. March, April and May are the hottest and most humid months, and the rainy season runs from May to October. During the wet season, rain is common throughout the day and it’s wise to invest in a good umbrella.