楼主的资料很好，可是却验证大家一致的说法阿在那个pdf文件里，第14页，写得很清楚： Singapore’s weather is traditionally classified into 4 periods according to average prevailing wind directions: a) Northeast Monsoon Season (December to Early March) b) Inter-monsoon Period (Late March to May) c) Southwest Monsoon Season (June to September) d) Inter-monsoon Period (October to November) The transitions between the monsoon seasons occur gradually, generally over a period of 2 months. The winds during these transitions or Inter-monsoon Periods are usually light and tend to vary in direction daily. 楼主说 南西季风 这个很郁闷。。。southwest的中文就是西南。。。不是南西。。。