Seoul - Five-Day Weather ForecastSeoul ClimateTemperatures in Seoul vary greatly between the summer and the winter. The highest temperature is about 38 degrees Celsius (102 degrees Fahrenheit), which occurs between July and August, whilst the lowest temperature is about -10 degrees Celsius (14 degrees Fahrenheit). Summers in Seoul are also rather humid. Whilst visitors to Seoul in autumn can look forward to clear azure skies, those visiting between June and September should take notice of the fact that this is the monsoon season, and is likely to be very rainy indeed!
Seoul Climate Chart