"though" simply emphasizes the difference in between the first clause and the second...it's basically a shortened form of "although" (which means "in spite of the fact"). One could say: It was a cold morning ALTHOUGH I still went for a run...........or It was a cold morning but i still went for a run THOUGH. Hope this helps.

"It was a cold morning but I still went for a run though." means the same as "Although it was a cold morning, I still went for a run." It basically means that despite something happening or being, the second thing still happened. Most people would not go running in cold weather yet this person still went for a run. :)

I agree with Shawn's answer but disagree with the other answers. "Though" or "although" is used to mean "in spite of" in this example. Using both "but" and "though" in the second part of the sentence makes it awkward sounding. The following are correct and natural: It was a cold morning, but I still went for a run. It was a cold morning. I still went for a run though. (two sentences) Though it was a cold morning, I still went for a run.

It means, "Be that as it may, I went for a run", "Nevertheless, I went for a run". The particular example you gave does not impress me as good English because 'still' and 'though' seem redundant.

Although all the responses make good points, the bottom line is that "though", appearing at the end of a sentence, is essentially redundant. Generally, the best writing utilizes the fewest words to illustrate the point. Unfortunately, I frequently violate this rule :)