noun
UV index; ultraviolet index
A measure of the strength of ultraviolet radiation from the sun, commonly used in weather reports and sun protection guidance.
See also: 紫外線指数
今日のUVインデックスは非常に高いので、日焼け止めを忘れずに。
Today's UV index is very high, so don't forget sunscreen.
天気予報でUVインデックスを確認してから出かけます。
I check the UV index on the weather forecast before going out.