According to the Central Weather Bureau (CWB), over the last 50 years an average of 26.7 tropical cyclones have formed per year in the northwest Pacific. But this year there was a noticeable decline by about 30 %. Nonetheless, there was no corresponding drop in the number to hit Taiwan, with five having already come ashore as of the early October, above the annual average of between three and four.
根據中央氣象局統計，近 50 年來西北太平洋每年生成的颱風總數約為 26.7 個，但今年卻明顯偏少，約較氣候平均值少了 3 成，但侵台個數並未跟著變少，截至 10 月上旬，已有 5 個颱風侵襲台灣，較平均 3 至 4 個的統計還多出一個。