The authors studied the climatic conditions under which dairy animals at Behera, Alexandria and Kafr El-Sheikh Provinces were managed. The results showed that the temperature and relative humidity had an inffuence on the milk yield of the animals. Increase in both temperature degree and humidity percen tage mainly affects the constituents.
Temperature degree and humidity percentage in closed stables were 22.45+1.3, 70.47+8.5 and 23.85+2.9, 74.35+7.4 for indoors and outdoors respectively.
The average milk yields in summer and winter were 212.64+1400 and 2637.3+1145 Kg respectively. The average fat percent in the respective two seasons was 3.57+0.28 and 3.86+0.26. At the same time total solids were 12.35+0.51 and 12.52+0.48 in summer and winter respectively.