Kuala Lumpur remains at a fairly constant 28-32°C all year round. There's no cool season and it can rain at any time of the year. Following rainfall, temperatures can drop noticeably, making things a bit more comfortable. From May to July, Kuala Lumpur weather is probably at its best, but this dynamic multicultural city can be enjoyed at any time of the year.
Kuala Lumpur has two monsoon periods, from March to April and from October to November, when the rain tends to switch from the mornings to the late afternoon, raining for an hour or so at a time.