I visited recently and this was my experience. The weather is humid, very hot usually between 29 and 32 celsius with heavy storms for short periods of time.
My suggestions are – Cotton clothing with a light weight jumper or fleece for air conditioned areas. Thin waterproof for the storms. Comfortable shoes if walking. Long sleeved shirts and trousers for early evening incase of mosquito bites ….I didn’t experience this but others did.