Daegwallyeong-myeon has a temperate climate. The average temperature is 8 degrees Celsius. The warmest month is August, at around 20 degree Celsius. The coldest month is January. The temperatures can reach minus 6 degrees Celsius. The average rainfall is around 1530 millimetres a year. The wettest month is July. The rainfall is around 330 millimeters in July. The month with the lowest rainfall is December. In December, around 40 millimeters of rain is recorded. 