I decided not to go for 15km, and kind of felt like 7 would be enough. Weather was not great and I had a bunch of things to do. I was feeling great on the run so I kept telling myself to just keep going and go for 10. In the middle of the run a light rain started falling, which then turned to a harder rain (but not very hard). It was pleasant, however, as it was not windy and the temperature was decent.
I decided to make it to 10 and not go further, and that's what I did. I find it important to let myself dictate to me what I will do and not let myself just get carried along by things..