Based on the observational data of daily maximum temperature, precipitation and maximum wind speed during Olympic Games and blowing dust, heavy fog, thunderstorm and hail weather during August from 1951 to 2006 in Tianjin, the probabilities and distribution characteristics of the extreme weather/climate events such as high temperature, rainstorm, gale, heavy fog and thunderstorm, which is disadvantageous to sports competition， are analyzed in order to provide meteorological support for football games in Tianjin during the Beijing Olympic Games in 2008. The results show that the occurrence probabilities of high temperature, rainstorm, thunderstorm， and heavy fog are higher， while the occurrence probabilities of gale, blowing dust and hail are lower.