When to go · South Korea
South Korea in September
Mixed month. Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
Key facts
- Verdict
- Mixed
- Crowds
- Medium
- South Korea
- Prices
- Medium
- South Korea
Verdict
Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
Is another month better than September?
September is rated mixed. These months rate higher:
- OctoberGreatClear skies, autumn colour in the mountains, festivals everywhere; Chuseok falls here some years.
- AprilGreatCherry blossom in Seoul and Gyeongju early in the month; dust days still happen.
- MayGreatWarm and dry; Buddha's Birthday lanterns and Children's Day crowds.
- NovemberGoodColour moves south to Seoul's palaces early in the month; cold arrives by the end.
Weather in September
- Seoul and north-west · Seoul, Incheon, Suwon, the DMZfine
Continental: dry winters down to −15 °C (5 °F) on cold snaps, hot humid summers. Fine dust (yellow dust and pollution) peaks Mar–Apr; the monsoon runs late Jun – Jul.Continental: dry winters down to 5 °F (−15 °C) on cold snaps, hot humid summers. Fine dust (yellow dust and pollution) peaks Mar–Apr; the monsoon runs late Jun – Jul.
- Busan and south-east coast · Busan, Gyeongju, Tongyeong, Ulsanstorm or typhoon risk
Milder winters than Seoul, rarely below freezing; typhoons most likely Aug–Sep and ferries to Japan stop when they pass.
- Jeju · Jeju City, Seogwipo, Hallasanstorm or typhoon risk
Windy and wet; the island takes the first hit of most typhoons. Hallasan summit gets snow in winter; flights stop in strong crosswinds.
- Gangwon mountains and east coast · Sokcho, Seoraksan, Gangneung, Pyeongchangbest weather
Coldest region: ski season Dec–Feb, peak autumn colour mid-October in Seoraksan; summer beaches crowded in late Jul – Aug.
- Gangwon: East coast (Sokcho, Gangneung, Yangyang) · East Sea shorelinebest weather
Milder than the interior; sea fog and rain in July–August, typhoon tail-ends in late summer.
- Gangwon: Inland mountains (Pyeongchang, Taebaek, Inje) · Taebaek rangebest weather
Coldest in Korea in winter; ski resorts usually run late November to March. Autumn colour peaks in October.
- Gyeonggi: Gyeonggi lowlands (Suwon, Incheon, Gimpo) · west and south of Seoulbest weather
Monsoon rain late June to July; August is hot and humid; January nights drop well below freezing.
- Gyeonggi: Eastern hills (Gapyeong, Yangpyeong, Pocheon) · Gyeongchun and Jungang line corridorsbest weather
A few degrees cooler than the lowlands; autumn colour peaks in late October and early November.
- Jeju: Jeju City / north coast · island northrainy
Milder than the mainland; heaviest rain June–September, typhoons Aug–Sep.
- Jeju: Seogwipo / south coast · island southrainy
Wetter and slightly warmer than the north; Hallasan summit is much colder and often in cloud.
- North Chungcheong: Inland basin (Cheongju, Chungju, Jecheon) · Province-wide, landlockedbest weather
Continent-style swings: July–August humid and 30 °C (86 °F)+, January often below -5 °C (23 °F). Rainy season (jangma) late June to mid-July; autumn leaves peak late October to early November.Continent-style swings: July–August humid and 86 °F (30 °C)+, January often below 23 °F (-5 °C). Rainy season (jangma) late June to mid-July; autumn leaves peak late October to early November.
- North Gyeongsang: Inland basin (Gyeongju, Andong, Daegu) · Interior valleys ringed by the Sobaek and Taebaek rangesbest weather
Daegu and the basins run several degrees hotter than the coast in July–August; monsoon rain lands late June to July, and typhoons can reach the east coast in August–September.
- North Gyeongsang: East coast (Pohang) · Seaward side of the Taebaek rangebest weather
Milder winters and cooler summers than the interior; sea fog and wind are the trade-off.
- North Jeolla: Jeonju and the plains · Inland basin, west of the mountainsbest weather
Hot, humid July–August; monsoon rain late June to July; cold, dry winters. Autumn is the clearest and busiest.
- North Jeolla: Mountains (Muju, Deogyusan) · East of the provincebest weather
Cooler than the plains; snow and skiing December to early March; foliage peaks in October.
- South Chungcheong: Inland (Cheonan, Daejeon, Gongju, Buyeo) · Province interiorbest weather
Rainy season (jangma) late June to mid-July; August is humid and 30 °C (86 °F)+; January nights drop well below freezing.Rainy season (jangma) late June to mid-July; August is humid and 86 °F (30 °C)+; January nights drop well below freezing.
- South Chungcheong: West coast (Seosan, Dangjin, Hongseong) · Yellow Sea shorebest weather
Coastal fog and wind in spring; tidal flats are best at low tide — check the tide table before you go.
- South Gyeongsang: South coast (Busan, Tongyeong, Geoje) · coast and islandsfine
Rainy season (jangma) late June to mid-July; typhoons can hit Aug-Sep and stop ferries for a day.
- South Gyeongsang: Inland (Jinju, Miryang, Hapcheon) · Nakdong basin and mountainsfine
Hotter and colder than the coast; Haeinsa sits high and is cooler in summer.
- South Jeolla: Gwangju and the interior · Honam plainfine
Warmest province on the peninsula; July–August average highs near 30 °C (86 °F) with 290–330 mm of rain each month. Spring and October are the dry, comfortable windows.Warmest province on the peninsula; July–August average highs near 86 °F (30 °C) with 290–330 mm of rain each month. Spring and October are the dry, comfortable windows.
- South Jeolla: Yeosu and the south coast · Yellow Sea and Jeju Straitfine
Sea moderates the heat; fog and wind can delay ferries in spring and autumn.
- Seoul26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Andong26 °C (79 °F) / 16 °C (61 °F), 9 rain days79 °F (26 °C) / 61 °F (16 °C), 9 rain days
- Ansan27 °C (81 °F) / 16 °C (61 °F), 8 rain days81 °F (27 °C) / 61 °F (16 °C), 8 rain days
- Anseong27 °C (81 °F) / 17 °C (63 °F), 8 rain days81 °F (27 °C) / 63 °F (17 °C), 8 rain days
- Anyang25.9 °C (79 °F) / 18.2 °C (65 °F), 9 rain days79 °F (25.9 °C) / 65 °F (18.2 °C), 9 rain days
- Asan27 °C (81 °F) / 17 °C (63 °F), 8 rain days81 °F (27 °C) / 63 °F (17 °C), 8 rain days
- Baengnyeong Island23.5 °C (74 °F) / 17.8 °C (64 °F), 91 rain days74 °F (23.5 °C) / 64 °F (17.8 °C), 91 rain days
- Boryeong26 °C (79 °F) / 17 °C (63 °F), 8 rain days79 °F (26 °C) / 63 °F (17 °C), 8 rain days
- Buan17 °C (63 °F) / 27 °C (81 °F), 139 rain days63 °F (17 °C) / 81 °F (27 °C), 139 rain days
- Bucheon27 °C (81 °F) / 18 °C (64 °F), 7 rain days81 °F (27 °C) / 64 °F (18 °C), 7 rain days
- Bundang27 °C (81 °F) / 17 °C (63 °F), 9 rain days81 °F (27 °C) / 63 °F (17 °C), 9 rain days
- Buyeo27 °C (81 °F) / 16 °C (61 °F), 9 rain days81 °F (27 °C) / 61 °F (16 °C), 9 rain days
- Changwon27 °C (81 °F) / 19 °C (66 °F), 9 rain days81 °F (27 °C) / 66 °F (19 °C), 9 rain days
- Cheonan26.1 °C (79 °F) / 15.2 °C (59 °F), 8 rain days79 °F (26.1 °C) / 59 °F (15.2 °C), 8 rain days
- Cheongju26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Cheorwon26 °C (79 °F) / 15 °C (59 °F), 8 rain days79 °F (26 °C) / 59 °F (15 °C), 8 rain days
- Chujado25 °C (77 °F) / 19 °C (66 °F), 11 rain days77 °F (25 °C) / 66 °F (19 °C), 11 rain days
- Chuncheon26 °C (79 °F) / 15 °C (59 °F), 9 rain days79 °F (26 °C) / 59 °F (15 °C), 9 rain days
- Daebudo26 °C (79 °F) / 18 °C (64 °F), 8 rain days79 °F (26 °C) / 64 °F (18 °C), 8 rain days
- Daegu27 °C (81 °F) / 18 °C (64 °F), 9 rain days81 °F (27 °C) / 64 °F (18 °C), 9 rain days
- Daejeon26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Damyang27 °C (81 °F) / 17 °C (63 °F), 9 rain days81 °F (27 °C) / 63 °F (17 °C), 9 rain days
- Dangjin25 °C (77 °F) / 18 °C (64 °F), 8 rain days77 °F (25 °C) / 64 °F (18 °C), 8 rain days
- Danyang27 °C (81 °F) / 15 °C (59 °F), 10 rain days81 °F (27 °C) / 59 °F (15 °C), 10 rain days
- Deokjeok Island25 °C (77 °F) / 17 °C (63 °F), 8 rain days77 °F (25 °C) / 63 °F (17 °C), 8 rain days
- Deokso23 °C (73 °F) / 15 °C (59 °F), 7 rain days73 °F (23 °C) / 59 °F (15 °C), 7 rain days
- Dongducheon26 °C (79 °F) / 15 °C (59 °F), 8 rain days79 °F (26 °C) / 59 °F (15 °C), 8 rain days
- Donghae25 °C (77 °F) / 16 °C (61 °F), 9 rain days77 °F (25 °C) / 61 °F (16 °C), 9 rain days
- Ganghwa Island26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Gangneung25 °C (77 °F) / 16 °C (61 °F), 10 rain days77 °F (25 °C) / 61 °F (16 °C), 10 rain days
- Gapado25 °C (77 °F) / 19 °C (66 °F), 10 rain days77 °F (25 °C) / 66 °F (19 °C), 10 rain days
- Gapyeong26 °C (79 °F) / 15 °C (59 °F), 9 rain days79 °F (26 °C) / 59 °F (15 °C), 9 rain days
- Geoje26.5 °C (80 °F) / 18.2 °C (65 °F), 10 rain days80 °F (26.5 °C) / 65 °F (18.2 °C), 10 rain days
- Geomundo26 °C (79 °F) / 19 °C (66 °F), 9 rain days79 °F (26 °C) / 66 °F (19 °C), 9 rain days
- Gimcheon26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Gimhae28 °C (82 °F) / 19 °C (66 °F), 12 rain days82 °F (28 °C) / 66 °F (19 °C), 12 rain days
- Gimje24 °C (75 °F) / 15 °C (59 °F), 9 rain days75 °F (24 °C) / 59 °F (15 °C), 9 rain days
- Gimpo26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Goheung27 °C (81 °F) / 17 °C (63 °F), 11 rain days81 °F (27 °C) / 63 °F (17 °C), 11 rain days
- Gongju27 °C (81 °F) / 16 °C (61 °F), 8 rain days81 °F (27 °C) / 61 °F (16 °C), 8 rain days
- Goryeong27 °C (81 °F) / 17 °C (63 °F), 9 rain days81 °F (27 °C) / 63 °F (17 °C), 9 rain days
- Goseong25 °C (77 °F) / 15 °C (59 °F), 9 rain days77 °F (25 °C) / 59 °F (15 °C), 9 rain days
- Goyang27 °C (81 °F) / 16 °C (61 °F), 8 rain days81 °F (27 °C) / 61 °F (16 °C), 8 rain days
- Guinsa24 °C (75 °F) / 15 °C (59 °F), 7 rain days75 °F (24 °C) / 59 °F (15 °C), 7 rain days
- Gumi26 °C (79 °F) / 16 °C (61 °F), 9 rain days79 °F (26 °C) / 61 °F (16 °C), 9 rain days
- Gunpo26 °C (79 °F) / 18 °C (64 °F), 8 rain days79 °F (26 °C) / 64 °F (18 °C), 8 rain days
- Gunsan26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Gunwi County27 °C (81 °F) / 16 °C (61 °F), 4 rain days81 °F (27 °C) / 61 °F (16 °C), 4 rain days
- Gwacheon26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Gwanggyo26 °C (79 °F) / 16 °C (61 °F), 9 rain days79 °F (26 °C) / 61 °F (16 °C), 9 rain days
- Gwangju, Gyeonggi26 °C (79 °F) / 16 °C (61 °F), 8 rain days79 °F (26 °C) / 61 °F (16 °C), 8 rain days
- Gwangju27 °C (81 °F) / 18 °C (64 °F), 9 rain days81 °F (27 °C) / 64 °F (18 °C), 9 rain days
- Gwangmyeong27 °C (81 °F) / 19 °C (66 °F), 8 rain days81 °F (27 °C) / 66 °F (19 °C), 8 rain days
- Gwangyang27 °C (81 °F) / 18 °C (64 °F), 7 rain days81 °F (27 °C) / 64 °F (18 °C), 7 rain days
- Gyeongju26 °C (79 °F) / 16 °C (61 °F), 10 rain days79 °F (26 °C) / 61 °F (16 °C), 10 rain days
- Gyeongsan24 °C (75 °F) / 15 °C (59 °F), 9 rain days75 °F (24 °C) / 59 °F (15 °C), 9 rain days
- Haenam27 °C (81 °F) / 17 °C (63 °F), 10 rain days81 °F (27 °C) / 63 °F (17 °C), 10 rain days
- Hampyeong26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Hapcheon27 °C (81 °F) / 16 °C (61 °F), 9 rain days81 °F (27 °C) / 61 °F (16 °C), 9 rain days
- Hongdo23 °C (73 °F) / 16 °C (61 °F), 8 rain days73 °F (23 °C) / 61 °F (16 °C), 8 rain days
- Hongseong26 °C (79 °F) / 15 °C (59 °F), 9 rain days79 °F (26 °C) / 59 °F (15 °C), 9 rain days
- Hwaseong26 °C (79 °F) / 17 °C (63 °F), 8 rain days79 °F (26 °C) / 63 °F (17 °C), 8 rain days
- Icheon26 °C (79 °F) / 15 °C (59 °F), 12 rain days79 °F (26 °C) / 59 °F (15 °C), 12 rain days
- Iksan26 °C (79 °F) / 17 °C (63 °F), 0 rain days79 °F (26 °C) / 63 °F (17 °C), 0 rain days
- Inje25 °C (77 °F) / 14.5 °C (58 °F), 9 rain days77 °F (25 °C) / 58 °F (14.5 °C), 9 rain days
- Jangheung26.9 °C (80 °F) / 16.5 °C (62 °F), 9 rain days80 °F (26.9 °C) / 62 °F (16.5 °C), 9 rain days
- Jebudo26 °C (79 °F) / 18 °C (64 °F), 8 rain days79 °F (26 °C) / 64 °F (18 °C), 8 rain days
- Jecheon25 °C (77 °F) / 13 °C (55 °F), 8 rain days77 °F (25 °C) / 55 °F (13 °C), 8 rain days
- Jeongdongjin23 °C (73 °F) / 14 °C (57 °F), 4 rain days73 °F (23 °C) / 57 °F (14 °C), 4 rain days
- Jeongeup27 °C (81 °F) / 17 °C (63 °F), 10 rain days81 °F (27 °C) / 63 °F (17 °C), 10 rain days
- Jeongseon22 °C (72 °F) / 12 °C (54 °F), 9 rain days72 °F (22 °C) / 54 °F (12 °C), 9 rain days
- Jeonju27 °C (81 °F) / 17 °C (63 °F), 8 rain days81 °F (27 °C) / 63 °F (17 °C), 8 rain days
- Jindo26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Jinju27 °C (81 °F) / 17 °C (63 °F), 9 rain days81 °F (27 °C) / 63 °F (17 °C), 9 rain days
- Jumunjin26 °C (79 °F) / 16 °C (61 °F), 10 rain days79 °F (26 °C) / 61 °F (16 °C), 10 rain days
- Miryang26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Mokpo27 °C (81 °F) / 19 °C (66 °F), 9 rain days81 °F (27 °C) / 66 °F (19 °C), 9 rain days
- Muan26.7 °C (80 °F) / 17.6 °C (64 °F), 9 rain days80 °F (26.7 °C) / 64 °F (17.6 °C), 9 rain days
- Muju25 °C (77 °F) / 16 °C (61 °F), 9 rain days77 °F (25 °C) / 61 °F (16 °C), 9 rain days
- Mungyeong25.3 °C (78 °F) / 14.5 °C (58 °F), 8 rain days78 °F (25.3 °C) / 58 °F (14.5 °C), 8 rain days
- Naju17 °C (63 °F) / 27 °C (81 °F), 56 rain days63 °F (17 °C) / 81 °F (27 °C), 56 rain days
- Namhae27 °C (81 °F) / 20 °C (68 °F), 6 rain days81 °F (27 °C) / 68 °F (20 °C), 6 rain days
- Namwon15.6 °C (60 °F) / 27 °C (81 °F), 144 rain days60 °F (15.6 °C) / 81 °F (27 °C), 144 rain days
- Namyangju26 °C (79 °F) / 15 °C (59 °F), 8 rain days79 °F (26 °C) / 59 °F (15 °C), 8 rain days
- Nonsan26 °C (79 °F) / 17 °C (63 °F), 8 rain days79 °F (26 °C) / 63 °F (17 °C), 8 rain days
- Paju26 °C (79 °F) / 15 °C (59 °F), 8 rain days79 °F (26 °C) / 59 °F (15 °C), 8 rain days
- Pangyo26 °C (79 °F) / 16 °C (61 °F), 8 rain days79 °F (26 °C) / 61 °F (16 °C), 8 rain days
- Pocheon26 °C (79 °F) / 15 °C (59 °F), 8 rain days79 °F (26 °C) / 59 °F (15 °C), 8 rain days
- Pohang26 °C (79 °F) / 19 °C (66 °F), 9 rain days79 °F (26 °C) / 66 °F (19 °C), 9 rain days
- Pyeongchang22 °C (72 °F) / 12 °C (54 °F), 9 rain days72 °F (22 °C) / 54 °F (12 °C), 9 rain days
- Pyeongtaek27 °C (81 °F) / 17 °C (63 °F), 8 rain days81 °F (27 °C) / 63 °F (17 °C), 8 rain days
- Sacheon24 °C (75 °F) / 18 °C (64 °F), 9 rain days75 °F (24 °C) / 64 °F (18 °C), 9 rain days
- Samcheok22 °C (72 °F) / 14 °C (57 °F), 7 rain days72 °F (22 °C) / 57 °F (14 °C), 7 rain days
- Sangju26 °C (79 °F) / 16 °C (61 °F), 8 rain days79 °F (26 °C) / 61 °F (16 °C), 8 rain days
- Sejong City26 °C (79 °F) / 15 °C (59 °F), 9 rain days79 °F (26 °C) / 59 °F (15 °C), 9 rain days
- Seogwipo26 °C (79 °F) / 20 °C (68 °F), 10 rain days79 °F (26 °C) / 68 °F (20 °C), 10 rain days
- Seongju County26 °C (79 °F) / 16 °C (61 °F), 9 rain days79 °F (26 °C) / 61 °F (16 °C), 9 rain days
- Seongnam26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Seosan26.1 °C (79 °F) / 16.1 °C (61 °F), 9 rain days79 °F (26.1 °C) / 61 °F (16.1 °C), 9 rain days
- Siheung27 °C (81 °F) / 18 °C (64 °F), 8 rain days81 °F (27 °C) / 64 °F (18 °C), 8 rain days
- Sokcho25 °C (77 °F) / 16 °C (61 °F), 9 rain days77 °F (25 °C) / 61 °F (16 °C), 9 rain days
- Somaemuldo26 °C (79 °F) / 19 °C (66 °F), 9 rain days79 °F (26 °C) / 66 °F (19 °C), 9 rain days
- Songdo26 °C (79 °F) / 18 °C (64 °F), 8 rain days79 °F (26 °C) / 64 °F (18 °C), 8 rain days
- Suanbo26 °C (79 °F) / 16 °C (61 °F), 8 rain days79 °F (26 °C) / 61 °F (16 °C), 8 rain days
- Suwon26 °C (79 °F) / 17 °C (63 °F), 9 rain days79 °F (26 °C) / 63 °F (17 °C), 9 rain days
- Taebaek22 °C (72 °F) / 12 °C (54 °F), 10 rain days72 °F (22 °C) / 54 °F (12 °C), 10 rain days
- Tongyeong27 °C (81 °F) / 19 °C (66 °F), 9 rain days81 °F (27 °C) / 66 °F (19 °C), 9 rain days
- Udo Island25 °C (77 °F) / 17 °C (63 °F), 8 rain days77 °F (25 °C) / 63 °F (17 °C), 8 rain days
- Uijeongbu-si26 °C (79 °F) / 16 °C (61 °F), 8 rain days79 °F (26 °C) / 61 °F (16 °C), 8 rain days
- Uijeongbu26 °C (79 °F) / 16 °C (61 °F), 7 rain days79 °F (26 °C) / 61 °F (16 °C), 7 rain days
- Uiryeong27 °C (81 °F) / 20 °C (68 °F), 8 rain days81 °F (27 °C) / 68 °F (20 °C), 8 rain days
- Uiwang23 °C (73 °F) / 15 °C (59 °F), 8 rain days73 °F (23 °C) / 59 °F (15 °C), 8 rain days
- Ulsan26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Wonju26 °C (79 °F) / 16 °C (61 °F), 0 rain days79 °F (26 °C) / 61 °F (16 °C), 0 rain days
- Yanggu24 °C (75 °F) / 14 °C (57 °F), 10 rain days75 °F (24 °C) / 57 °F (14 °C), 10 rain days
- Yangju27 °C (81 °F) / 15 °C (59 °F), 8 rain days81 °F (27 °C) / 59 °F (15 °C), 8 rain days
- Yangsan27 °C (81 °F) / 19 °C (66 °F), 10 rain days81 °F (27 °C) / 66 °F (19 °C), 10 rain days
- Yangyang24 °C (75 °F) / 16 °C (61 °F), 11 rain days75 °F (24 °C) / 61 °F (16 °C), 11 rain days
- Yecheon27 °C (81 °F) / 19 °C (66 °F), 7 rain days81 °F (27 °C) / 66 °F (19 °C), 7 rain days
- Yeoju27 °C (81 °F) / 15 °C (59 °F), 154 rain days81 °F (27 °C) / 59 °F (15 °C), 154 rain days
- Yeoncheon26 °C (79 °F) / 15 °C (59 °F), 7 rain days79 °F (26 °C) / 59 °F (15 °C), 7 rain days
- Yeongcheon26 °C (79 °F) / 18 °C (64 °F), 8 rain days79 °F (26 °C) / 64 °F (18 °C), 8 rain days
- Yeongjong Island25 °C (77 °F) / 17 °C (63 °F), 8 rain days77 °F (25 °C) / 63 °F (17 °C), 8 rain days
- Yeongju24 °C (75 °F) / 13 °C (55 °F), 9 rain days75 °F (24 °C) / 55 °F (13 °C), 9 rain days
- Yeongwol23 °C (73 °F) / 13 °C (55 °F), 8 rain days73 °F (23 °C) / 55 °F (13 °C), 8 rain days
- Yeonpyeong Island26 °C (79 °F) / 18 °C (64 °F), 9 rain days79 °F (26 °C) / 64 °F (18 °C), 9 rain days
- Yeosu26 °C (79 °F) / 21.5 °C (71 °F), 9 rain days79 °F (26 °C) / 71 °F (21.5 °C), 9 rain days
- Yesan26 °C (79 °F) / 16 °C (61 °F), 10 rain days79 °F (26 °C) / 61 °F (16 °C), 10 rain days
- Yokjido25 °C (77 °F) / 19 °C (66 °F), 9 rain days77 °F (25 °C) / 66 °F (19 °C), 9 rain days
- Yongin26 °C (79 °F) / 15 °C (59 °F), 8 rain days79 °F (26 °C) / 59 °F (15 °C), 8 rain days
- Yuseong-gu27 °C (81 °F) / 17 °C (63 °F), 9 rain days81 °F (27 °C) / 63 °F (17 °C), 9 rain days
- Busan27 °C (81 °F) / 19 °C (66 °F), 11 rain days81 °F (27 °C) / 66 °F (19 °C), 11 rain days
- Jeju City26 °C (79 °F) / 20 °C (68 °F), 11 rain days79 °F (26 °C) / 68 °F (20 °C), 11 rain days
- Incheon26 °C (79 °F) / 18 °C (64 °F), 8 rain days79 °F (26 °C) / 64 °F (18 °C), 8 rain days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Chuseok (harvest festival) big impact
Chuseok: 24–26 Sep 2026 (passed); about 14–16 Sep 2027 (check)
Same three-day shutdown as Seollal; the largest travel peak of the year.
Crowds and prices
- Crowds · South Korea
- Medium
- Prices · South Korea
- Medium
Compare two months
Weather, crowds and prices for any two months in South Korea, side by side.
Verdict
Sep: Mixed
Apr: Great (better)
Crowds
Sep: Medium
Apr: High
Prices
Sep: Medium
Apr: High
Festivals listed
Sep: 1
Apr: 4
September: Heat eases; typhoon risk remains and Chuseok shuts the country for 3 days in many years.
April: Cherry blossom in Seoul and Gyeongju early in the month; dust days still happen.
South Korea: figures are long-term averages from this guide, not a forecast.
What to pack
- A rain jacket or umbrella and shoes that dry fast
- A spare day in the plan: storms can cancel flights and ferries
Where to go in September
Rated best or good this month
Gangwon mountains and east coast
Best weather of the year (Sokcho, Seoraksan, Gangneung, Pyeongchang)
Best months: Sep–Oct; also Apr–May
Best months: Apr–Jun, Sep–Oct
Best months: Apr–May, Sep–Oct
Best months: Apr–May, Sep–Nov
Best months: May–Jun, Sep–Oct
Best months: May–Jun, Sep–Oct; July for the Mud Festival
Best months: Apr–Oct
Best months: Apr–Oct
Best months: Apr–Jun, Sep–Nov
Best months: Apr–May, Sep–Oct
Best months: Apr–Jun, Sep–Nov
Better another month
Busan and south-east coast
Milder winters than Seoul, rarely below freezing; typhoons most likely Aug–Sep and ferries to Japan stop when they pass.
Jeju
Windy and wet; the island takes the first hit of most typhoons. Hallasan summit gets snow in winter; flights stop in strong crosswinds.