Seoul

===Climate===
{{Main|Climate of Seoul}}
{{climate chart
| Seoul
| −5.5 |  2.1 |  16.8
| -3.2 |  5.1 |  28.2
|  1.9 | 11.0 |  36.9
|  8.0 | 17.9 |  72.9
| 13.5 | 23.6 | 103.6
| 18.7 | 27.6 | 129.5
| 22.3 | 29.0 | 414.4
| 22.9 | 30.0 | 348.2
| 17.7 | 26.2 | 141.5
| 10.6 | 20.2 |  52.2
|  3.5 | 11.9 |  51.1
| -3.4 |  4.2 |  22.6
|float=right}}
Seoul has a [[humid continental climate|humid continental]] ([[Köppen climate classification|Köppen]]: ''Dwa'') or [[humid subtropical climate]] (''Cwa'', by {{convert|&minus;3|°C|1|disp=or}} isotherm), influenced by the [[monsoon]]s; there is great variation in temperature and precipitation throughout the year.<ref>{{Cite web|url=http://www.weatherbase.com/weather/weather-summary.php3?s=80174&cityname=Seoul,+South+Korea|title=Seoul, South Korea Köppen Climate Classification (Weatherbase)|website=Weatherbase|access-date=9 June 2019|archive-date=10 October 2020|archive-url=https://web.archive.org/web/20201010214852/http://www.weatherbase.com/weather/weather-summary.php3?s=80174&cityname=Seoul%2C+South+Korea|url-status=live}}</ref><ref>{{Citation|last=Peterson|first=Adam|title=English: Data sources: Köppen types calculated from data from WorldClim.org|date=31 October 2018|url=https://commons.wikimedia.org/wiki/File:K%C3%B6ppen_climate_types_of_South_Korea.svg|access-date=9 June 2019|archive-date=10 October 2020|archive-url=https://web.archive.org/web/20201010214905/https://commons.wikimedia.org/wiki/File:K%C3%B6ppen_climate_types_of_South_Korea.svg|url-status=live}}</ref> The suburbs of Seoul are generally cooler than the center of Seoul because of the [[urban heat island]] effect.<ref>{{Cite journal|last1=Lee|first1=Sang-Hyun|last2=Baik|first2=Jong-Jin|date=1 March 2010|title=Statistical and dynamical characteristics of the urban heat island intensity in Seoul|url=https://www.researchgate.net/publication/226121380|journal=Theoretical and Applied Climatology|volume=100|issue=1–2|pages=227–237|doi=10.1007/s00704-009-0247-1|bibcode=2010ThApC.100..227L|s2cid=120641921|access-date=18 November 2018|archive-date=10 October 2020|archive-url=https://web.archive.org/web/20201010214906/https://www.researchgate.net/publication/226121380_Statistical_and_dynamical_characteristics_of_the_urban_heat_island_intensity_in_Seoul|url-status=live}}</ref> Summers are hot and humid, with the [[East Asian monsoon]] taking place from June until September. August, the hottest month, has average high and low temperatures of {{convert|30.0|and|22.9|C|F|0}} with higher temperatures possible. [[Heat index]] values can surpass {{convert|40|C|F|1}} at the height of summer. 
Winters are usually cold to freezing with average January high and low temperatures of {{convert|2.1|and|−5.5|C|F|1}}, and are generally much drier than summers, with an average of 24.9&nbsp;days of snow annually. Sometimes, temperatures drop dramatically to below {{convert|−10|C}}, and on some occasions as low as {{convert|−15|C}} in the mid winter period of January and February. Temperatures below {{convert|−20|C}} have been recorded.

{{Seoul weatherbox}}