The thermal and dynamic effects of wind on a human body are analyzed by means of computational fluid dynamics (CFD) technique. Wind effects on a human body are examined under various wind conditions. At first, the human body is placed in a stagnant wind environment. Secondly, the human body is set in a weak wind of velocity 0.25m/s, with several values of turbulence intensity. Next, the wind velocity attacking the human body is increased to 2.5m/s. Lastly, two human bodies are arranged standing in a row, facing the approaching wind. The velocity and temperature fields around the human body as well as the pressure field over the body surface are computed in detail. The drag coefficient and the convective heat transfer coefficient of the human body are calculated. The predicted results of velocity and temperature fields agree reasonably with previous experimental data.