[tgb]

This model doesn't take into account time of day, but many do. But those mostly seem to do so incorrectly, as far as I can tell. They tend to use the measure of "UVA/B incident on a horizontal square meter". However humans are not flat horizontal surfaces - and in fact a lot of my exposed skin is more vertical than horizontal. Therefore I think the correct measure should be "UVA/B incident on a meter-diameter sphere" or similar (where absorption from the atmosphere is the only contributor, not merely foreshortening). I was unable to identify numbers for this at all when I looked into it - does anyone know of a model that does this properly? Or just number of how much UVA/B is impacted by this?

[epiteton]

Try duplicating the project, it should give you access to the code. Also the API returns the current weather/UV index, so the result is always for the current time at the location.