The UV Index at Your Fingertips

When people talk about the weather, why don’t they ever discuss the UV index? They cover temperature, wind, and rain, but rarely a mention of the UVI. It seems like information worth keeping tabs on.

For those unfamiliar with the UV index, or ultraviolet index, it is a measure of the level of UV radiation for a given time and place. Standardized by the World Health Organization, the UV index provides a numeric value from zero to 11+. The higher the number, the higher the risk of skin and eye danger. Going out at levels of 8 or higher is not recommended without proper sun protection.

Knowing the forecasted UV index for your location can help you make sun-safe choices. You can plan your day to avoid the outdoors during periods of very high risk.

It is time that you followed the UV index like you do temperature or precipitation. With modern technology, that information can be a few simple taps away.

From a Browser

The Weather Channel

This popular, free website offers detailed UV index information in their “Hourly” forecasts. Click the down arrow for any hour to get the UVI.

The Weather Channel website UV index


Another free website that provides detailed UV index forecasts. Drill down to your location by clicking on an interactive map for a 3-day UVI forecast.

WillyWeather UV Index


Weather app

The default Weather app on every iPhone provides the current UV index. Just pull up a location and scroll to the bottom of the forecast.

iPhone Weather app UV index

Dark Sky app ($3.99)

Dark Sky uses GPS to provide pinpoint weather forecasts. Rather than telling you if it is raining in your town, Dark Sky tells you if it is raining over your house.

Change the default “TEMP” forecast to “UV INDEX” for a color-coded display of UVI by the hour.

Dark Sky iPhone app UV index


The Apple Watch can provide the current UV index wherever you are at. To add the UV index, enable a watch face with customizable fields, and choose UV Index from the Customize screen.

Apple Watch

Now that the UV index is so readily available, it should be a part of your daily planning. Take it into consideration, just as you do temperature and precipitation, when deciding what to wear and when to go out.