Second of nine views: Bangkok is a hot city.
The average temperature in Bangkok,Thailand in March is 29 degree Celsius. We had about 35 C every afternoon, and not a single drop of rain.
Shopping in Bangkok streets and markets is fun but can dehydrate you. If you visit e.g. one of the world’s largest weekend market Chatuchak – you easily spend the whole day there -, remember to drink enough. (But be warned: in the city center’s numerous air-conditioned department stores and shopping malls you can shiver.)