Typhoons, a stiff test for any weather bureau, often visit the Western Pacific, with an average of 15 per year, of which 3.5 come to Taiwan.
颱風是另一個考驗預報準確度的棘手對象。西太平洋為全球颱風最多的區域，每年約出現十五個颱風；平均其中三點五個會侵襲台灣，從六月到十一月都在「危險期」，尤以七、八、九，三個月為颱風旺季。