Dry season
The drier stretch in Kuala Lumpur is when outdoor days are the default. January, February, May and June sit on that side of the year. Heat is still the point. Rain is not gone, it is no longer in charge.
Kuala Lumpur in Malaysia in these weeks is a warm-weather trip: early starts, shade at midday, evenings outside. It is not a European spring with a light jumper.
Read Kuala Lumpur in this stretch as its own climate, not as a generic holiday season copied from another destination.

