Climate is one of factors that can affect some animal physiological processes, Which can be shown on the animal health status and production outcomes. Due to latent thermal stress (sensible heat loss), decreased immune resistance can occur and the result can be manifested in higher incidence in intestinal parasite's infestation . The scope of our investigation was to establish the influence of different grazing conditions on the body surface temperatures measured on different parts of animal and correlation with lower weight gain and higher incidence in parasite infestation. The results showed that climate and weather conditions could influence the body surface temperature considerably, but the differences estab lished between animals at various grazing conditions in our preliminary measurements, were insignificant.