In Chinatown are hundreds of small shops and stalls where you can buy all sorts of things besides the "usual" shops where you can often buy gold and jewelry, besides the many shops where you can buy traditional gifts, at Sampheng Road can: clothes, glasses, souvenirs, gifts. From the weather it does not matter at what time you go shopping in Bangkok. Of course, one thinks, in the evening is cooler than during the day. That may be true, but in Bangkok it is usually crisply warm in the evenings.
In the evenings, the owners are increasingly tearing up their food stalls, and Chinatown is turning into a district that smells of delicious food at almost every corner. Most tourists prefer to visit Chinatown in the evening, as it is a gourmet paradise on the one hand, and Chinatown in the evening neon light on the other. Definitely worth a visit at both times of the day!