Performance in marathon running is influenced by a variety of factors, most of which were of the climate conditions that the factors such as ambient temperature, relative humidity, discomfort index induced from dry and wet bulb temperature, and wind resistance can affect running performance. The purpose of this study was to determine the influence of the climate factors and the superior marathoners' (total number of 52 in champion/semi-champion) in the Dang-A and Cho-II Marathon Races in Korea. The study examined correlation coefficient and its significant level, regression equation and standard error of estimate among the climate factors and the superior marathoners’ records. The results were as follows: Comparison of the mean value of the superior marathoner’s records in Dong-A Marathon Race was higher than that of Cho-II Marathon Race runners. The correlation coefficient between ambient temperature in the marathon, race and the superior marathoner’s records was r = +0.579 (p＜0.01), the induction from it, the obtained the following regresstion equation was Y = 9.075 + 0.371X (Y is expected runner’s record＜added 2 hrs>, and X is ambient temperature ℃), and standard error of estimate was ±2.29, respectively. It was not relationship between the relative humidity in race and the records of superior marathoner’s. However, it was found related in lower level of correlation confident between wind velocity and the records of runner’s (r = -0.281, p<0.05). The coefficient of correlation between discomfort index induced from dry and wet bulb temperature in the marathon race and runner's records high significant as r = +0,622(p<0.01) and its induced regression equation was shown as the following: Y = 0.293X - 2.697(Y is expected race record < added 2 hrs >, and X is discomfort index), and standard error of estimate was ±2.19, respectively. Finally, it is hope that these information could be use for reference in further study for the field of the sports science.