Malaysia has a typically tropical climate with temperatures ranging between 27 ºC and 35 ºC and humidity at around the 90% level, year round.
The tropics can take some adjusting to and it is advisable to take it easy on arrival if traveling from non-tropical climates though plentiful air-conditioning makes this adjustment easier. To echo the advice in a well-known song, “avoid going out in the noonday sun.”
As in all tropical countries, rain tends to fall in brief torrential downpours and is soon replaced by the sun. The whole region is monsoonal; between October and April on Peninsula Malaysia, the wind is from the north-east and it may rain every day. However, it is only the east coast of Peninsula Malaysia that has a real "rainy season", between November and January during which, for the other parts of the country, it is just a time when rainfall is slightly heavier than usual. For the rest of the year, the wind from the south-west makes for relatively drier days.