I mostly enjoy running in the morning (as I mentioned before). But sometimes it also happens that the only time I have to run is when the sun in full power, 80F+ and such. I wouldn't take Ohio for one of these burning sun states before we moved here, but it can burn here, hell, a lot.
No matter what sun conditions you have, if you run every day, you will most likely end up having a pretty strong runners' tan around the areas which are usually covered by the running gear by the end of the outdoors running season.
I am not different. And my tan stays on for pretty long time. For example, I am covered with all kinds of stripes and lines from the last year sun still, and it is already a time to get new ones.