For amusement parks, for example, if there is as little as 5 mm of rainfall in a day (about equivalent to a light shower), turnover can drop by as much as 30 % compared with a clear day. If the rainfall increases to 10 mm, the drop can increase to 60 %.
以戶外樂園為例，若當日雨量累積達 5 毫米（約小雨程度），業績收入即較晴天下降約 3 成；若雨勢加大而累積雨量達 10 毫米，業績更可下降 6 成。