Abstract
The paper presents results of research on the variability of temperature, humidity and air movement in selected areas of a free-stall barn during heavy frost. The study revealed the occurrence of unfavourable factors influencing microclimate in the barn. Some areas of the barn suffered from draughts, some were excessively exposed to sun or too shaded, which resulted in significant temperature and relative humidity fluctuations during the day as well as changes in air movement velocity. All these factors exerted an impact on cattle welfare. The conclusion points out the need to determine zones in the barn characterized by clearly different microclimatic conditions. In the studied example, these conditions were influenced by weather changes and depended on the orientation of the building to cardinal points as well as wall construction materials.