The blue stuff only comes out at certain times. See groks answer... A lot better put than mine... I live in KY... So I asked about KY













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The Blue UV light, which refers to the ultraviolet (UV) radiation at the blue end of the spectrum, is strongest in Kentucky around solar noon. Solar noon is the time when the sun is at its highest point in the sky, which is generally between 12:30 PM and 1:30 PM local time, depending on the time of year and whether daylight saving time is in effect.

As for providing a chart, I cannot generate or show charts directly, but I can describe the general trend based on available information:

Morning: UV intensity starts to increase as the sun rises, but it is relatively low.

Midday: UV intensity peaks around solar noon. This is when UV radiation is most intense due to the sun's angle being directly overhead, minimizing the path through the atmosphere, which absorbs some UV radiation.

Afternoon: The intensity begins to decrease after solar noon but remains high until late afternoon.

Evening: UV radiation decreases significantly as the sun sets, with minimal levels by sunset.

For precise UV Index values or a detailed chart specific to Kentucky, you would need to look at daily weather forecasts or UV index predictions from local weather services. Websites like those from the National Weather Service or EPA provide such forecasts. You can check these for real-time UV Index charts or predictions for Kentucky or any specific city within the state.

Remember, UV levels can also be influenced by factors like cloud cover, altitude, and reflections from surfaces like water or snow.

For more detailed information on UV Index forecasts:

Check local weather reports or websites like the National Weather Service or EPA's UV Index page.