Snow, wind, altitude and shelter are all critical factors in the design of an adequate hut structure. There is data available on rainfall, wind speeds and sunshine hours as they vary across Scotland. The first and second of these combine to give a driving rain index which will affect the choice and detailing of the cladding. The amount of sunshine and the path of the sun across the sky will affect the size and positioning of windows allowing useful passive solar gain and possibly dictate summer shading.
Follow the flow chart in figure 3A accompanied by wind map figure 3B and snow map 3C to see if your site factors are challenging enough that you need to consult a structural engineer. If your site factors do not present these challenges you can proceed to super structure and Appendices 1 and 2 to find a suitable structure without further climatic advice.