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US Environmental Protection Agency

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The UV Index provides a daily and hourly forecast of the expected intensity of ultraviolet (UV) radiation from the sun. Some exposure to sunlight is enjoyable. However, too much sun can be dangerous. Overexposure to the sun's ultraviolet radiation can cause immediate damage, such as sunburn, and long-term problems, such as skin cancer and cataracts.</div> <div jsname="WJz9Hc" style="display:none">紫外线指数提供了每日和每小时的预测，预期来自太阳的紫外线（UV）辐射强度。有些暴露在阳光下是愉快的。然而，太多的阳光可能会有危险。过度暴露于阳光中的紫外线辐射可造成直接损害，比如晒伤，和长期的问题，如皮肤癌和白内障。</div> <div class="show-more-end">

EPA's SunWise UV Index

EPA's SunWise UV Index的最新版本

其他版本