Here is the kind of clothes to be worn when in Mumbai,
what to wear in Bombay.

Mumbai/Bombay's
proximity to the sea has endowed it a Mediterranean Climate with
humidity hanging in the atmosphere making living quite sweaty and
uncomfortable for those not use to such climate.
When you traveling to Mumbai you must revamp your clothing
sensibilities and carry light, natural and cotton clothes. Cotton
clothes will keep your body airy and relieve you from sogginess of
sweat. Among your clothes while in Bombay you could carry shorts,
short-sleeved shirts, T-shirts and any other lightweight clothes that
will keep you comfortable.
Mostly the humid season is atrocious during March to October, so keep
yourself easy on clothes, wear loose and airy attires. While on the move
wear sandals or light shoes or slippers. However, the clothing affair
becomes less worrisome on fashion point in the evening when Mumbai comes
out with sparkling colors and trendy outfits. So, go rock your way when
in Mumbai!