Climate averages 1991–2020

Weather in South Korea.

ClimaNote covers 79 cities in South Korea, starting with Seoul, Busan and Incheon. Open a city for charts and a table of all 12 months, or open a month for a side-by-side comparison of cities in the atlas.

Across these cities the yearly average high ranges from 14.8°C in Sokcho to 18.9°C in Seogwipo, and yearly rainfall from 993 mm in Andong to 1,539 mm in Seogwipo. The hottest city-month is August in Gyeongsan-si, with an average high of 30.0°C, and the coolest is January in Chuncheon, at 1.0°C (tied with January in Hongch’ŏn). By single month, the most precipitation falls in July in Hwado, with 351 mm, and the least in January in Goyang-si, with 17 mm (tied with January in Paju).

August is the warmest month in every city; January is the coolest in every city. July is the wettest month in 72 cities, August in 5 and June in 2; January is the driest in 48 cities, December in 23 and February in 1 (in 7 other cities two or more months tie). Of these cities, 25 have a month with an average high below 2.0°C and 19 have a month with more than 300 mm of rain; none has a month with under 1 mm of rain.

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South Korea by month

79 cities

Cities in South Korea

Yearly averages

Seoul

Yearly climate averages for cities in Seoul
City	Average high	Average low	Rain mm/year
Seoul	16°C	7°C	1,196

Gyeonggi-do

Yearly climate averages for cities in Gyeonggi-do
City	Average high	Average low	Rain mm/year
Suwon	16°C	8°C	1,120
Goyang-si	16°C	7°C	1,183
Seongnam-si	16°C	7°C	1,294
Bucheon-si	16°C	8°C	1,144
Hwaseong-si	15°C	9°C	1,215
Ansan-si	16°C	8°C	1,215
Anyang-si	16°C	8°C	1,196
Uijeongbu-si	16°C	7°C	1,191
Paju	16°C	7°C	1,183
Pyeongtaek	17°C	8°C	1,103
Gwangmyeong	16°C	8°C	1,144
Hanam	17°C	7°C	1,294
Osan	17°C	8°C	1,120
Gimpo-si	16°C	8°C	1,144
Icheon-si	17°C	7°C	1,224
Guri-si	16°C	7°C	1,294
Yangju	16°C	7°C	1,191
Yeoju	17°C	7°C	1,196
Hwado	16°C	7°C	1,321
Wabu	16°C	7°C	1,294
Yangp'yŏng	17°C	8°C	1,273
Gwangju, South Korea	17°C	8°C	1,294

Busan

Yearly climate averages for cities in Busan
City	Average high	Average low	Rain mm/year
Busan	17°C	12°C	1,315
Gijang	17°C	12°C	1,355

Incheon

Yearly climate averages for cities in Incheon
City	Average high	Average low	Rain mm/year
Incheon	15°C	8°C	1,144

Gyeongsangnam-do

Yearly climate averages for cities in Gyeongsangnam-do
City	Average high	Average low	Rain mm/year
Changwon	18°C	10°C	1,292
Kimhae	18°C	11°C	1,302
Yangsan	18°C	11°C	1,302
Chinju	18°C	9°C	1,450
Geoje	17°C	13°C	1,406
Ungsang	17°C	11°C	1,226
Sinhyeon	17°C	13°C	1,425
Naesŏ	18°C	10°C	1,195
Changnyeong	19°C	9°C	1,085
Tongyeong	17°C	12°C	1,438

Daegu

Yearly climate averages for cities in Daegu
City	Average high	Average low	Rain mm/year
Daegu	18°C	9°C	1,075

Gyeongsangbuk-do

Yearly climate averages for cities in Gyeongsangbuk-do
City	Average high	Average low	Rain mm/year
Pohang	18°C	10°C	1,075
Gumi	18°C	9°C	1,114
Gyeongsan-si	19°C	9°C	1,037
Gyeongju	18°C	9°C	1,125
Andong	17°C	8°C	993
Gimcheon	18°C	9°C	1,211
Sangju	18°C	9°C	1,106
Yeongju	16°C	7°C	1,003
Mungyeong	17°C	8°C	1,106

Gwangju

Yearly climate averages for cities in Gwangju
City	Average high	Average low	Rain mm/year
Gwangju	18°C	9°C	1,229
Masan	18°C	9°C	1,206

Jeollabuk-do

Yearly climate averages for cities in Jeollabuk-do
City	Average high	Average low	Rain mm/year
Jeonju	17°C	9°C	1,200
Iksan	17°C	9°C	1,172
Gunsan	16°C	10°C	1,150
Jeongeup	17°C	9°C	1,254
Nangen	18°C	9°C	1,249
Koch'ang	17°C	10°C	1,183

Daejeon

Yearly climate averages for cities in Daejeon
City	Average high	Average low	Rain mm/year
Daejeon	18°C	9°C	1,083

Jeollanam-do

Yearly climate averages for cities in Jeollanam-do
City	Average high	Average low	Rain mm/year
Suncheon	18°C	10°C	1,512
Yeosu	17°C	12°C	1,454
Mokpo	17°C	11°C	1,239
Gwangyang	18°C	10°C	1,530
Muan	18°C	10°C	1,144
Kwangyang	18°C	10°C	1,512

Ulsan

Yearly climate averages for cities in Ulsan
City	Average high	Average low	Rain mm/year
Ulsan	18°C	11°C	1,226

Chungcheongnam-do

Yearly climate averages for cities in Chungcheongnam-do
City	Average high	Average low	Rain mm/year
Cheonan	17°C	8°C	1,158
Asan	17°C	8°C	1,109
Boryeong	16°C	10°C	1,166
Hongseong	17°C	9°C	1,155
Seosan	16°C	9°C	1,087
Gongju	18°C	9°C	1,168

Gangwon-do

Yearly climate averages for cities in Gangwon-do
City	Average high	Average low	Rain mm/year
Wŏnju	16°C	7°C	1,207
Chuncheon	16°C	7°C	1,216
Gangneung	15°C	9°C	1,257
Donghae City	16°C	9°C	1,188
Sokcho	15°C	8°C	1,125
Hongch’ŏn	16°C	7°C	1,174

North Chungcheong

Yearly climate averages for cities in North Chungcheong
City	Average high	Average low	Rain mm/year
Cheongju-si	17°C	8°C	1,147
Chungju	17°C	8°C	1,173

Jeju-do

Yearly climate averages for cities in Jeju-do
City	Average high	Average low	Rain mm/year
Jeju City	18°C	14°C	1,365
Seogwipo	19°C	14°C	1,539

Sejong-si

Yearly climate averages for cities in Sejong-si
City	Average high	Average low	Rain mm/year
Sejong	17°C	8°C	1,136

Yearly average of the 12 monthly values for 1991–2020. Open a city for every month.