Malaysia is generally warm throughout the year with temperatures ranging from 21° to 32° C in the lowlands. This can however be as low as 16° C in the hills and highlands. Annual rainfall is heavy at 2,500mm (100 inches). On a rainy day, thunder and lightning often accompany the heavy downpour which normally lasts for less than two hours. The humidity level is high at 80% throughout the year.
Generally, Malaysia has two seasons. The dry season from May to September, occurs during the south-west monsoon. The rainy season from November to March occurs during the north-east monsoon.