洗せん濯たく指し数すう

noun

laundry index

A numerical indicator used in weather forecasts to show how suitable the weather is for drying laundry outdoors. Higher values mean better drying conditions.

• 明日あしたの洗せん濯たく指し数すうは80％で、よく乾かわきそうです。

  Tomorrow's laundry index is 80%, so clothes should dry well.

• 洗せん濯たく指し数すうが低ひくい日ひは部屋へや干ぼしにしています。

  On days when the laundry index is low, I dry my laundry indoors.