Malaysia’s climate is equatorial, being hot and humid throughout the year. The maximum temperature and high humidity numbers for Kuala Lumpur so far in February 2018 bear this out.

Data courtesy of Weather Underground
I have written in the past about how to beat the heat. I wrote a post about how much to drink on a ride. Another post was about the efficacy of wearing a base layer. There was a post about how to keep sweat out of your eyes.
Lately a few riding buddies and I have taken heat and humidity management to a new level.
When possible, we have taken to starting rides before 5.30am. That way we get most of our riding in before the sun rises at around 7.30am. We get an average of 85km / 53mi done, and have breakfast, by about 9.30am. At that time of the morning the temperature is still in the mid 20s °C / mid 70s °F.
Not everyone can start a ride before 5.30am. I for one need to take a mid-afternoon nap. But for those who can, there is no better way to stay