There is multiple kinds of ARCSWAT inputs. First, you have to import aDEM (becarful for projection, it must be in projected coordinate system) , then you delineate watershed and sub-basins. Then you have to insert Land use, soil maps and launch slopes computation. then you enter weather data. I gave you some links that may help you.
Hello, i got weather data from two stations from https://globalweather.tamu.edu/. In order to use them do i need to merge them in a single text file,or i insert them individually. Moreover one of the two stations is a few km out of my watershed. Can i use them and if yes is the programm going make some some of calibration? I assume that the coordinates must be on same coordinate system with my layer. If yes up to how many numbers can i use for defining the coordinates?