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Green bamboo forest in Damyang in early summer

Korea in June 2027: Weather, Rainy Season and Holidays

Photo: Mar del Este, CC BY-SA 4.0 · Bamboo forest in Damyang South Korea 2015-05-06(6).jpg

Checked against official sources on October 20, 2026

Summary

June is warm and humid, and the rainy season starts late in the month. Seoul averages 22.7°C, with an average high of 27.6°C, an average low of 18.7°C and 129.5 mm of precipitation (KMA normals 1991–2020). The rainy season, jangma, normally begins around 19 June on Jeju, 23 June in the south and 25 June in Seoul. Memorial Day is Sunday 6 June 2027, with no substitute holiday listed (KASI).

At a glance

Seoul average
22.7°C
Average high
27.6°C
Average low
18.7°C
Precipitation
129.5 mm
Normal rainy season start
25 June in Seoul
Memorial Day
Sunday 6 June 2027

Details

June is the last easy month before the rain and the heat of high summer. Days are warm, and the rainy season normally reaches Seoul in the last week. This guide is written on 20 October 2026 for June 2027. Where organizers had not announced 2027 dates, it says so and shows the 2026 pattern.

Weather in June

City Average high (°C) Average low (°C) Precipitation (mm)
Seoul 27.6 18.7 129.5
Busan 24.6 18.3 188.4
Jeju City 24.9 19.1 171.2

Source: KMA climate normals 1991–2020, stations 108, 159 and 184 (KMA). Seoul's June average is 22.7°C, and its average relative humidity is 65.7%.

These are 30-year averages, not a forecast. Seoul has the highest daytime temperatures of the three cities in June, while Busan and Jeju get more rain. Check the KMA forecast in the week before you fly.

The rainy season, jangma

The summer rainy season, 장마jangmaRainy season, normally starts around 19 June on Jeju, 23 June in the south and 25 June in the central region, including Seoul. It lasts about 31 days on the mainland and about 32 days on Jeju (KMA). These are normal dates. The real start changes every year.

Freshly planted rice rows in a flooded paddy with mountains behind

For a June trip, this means plan outdoor days early in the month, with a back-up plan for the last week. The Korea Tourism Organization says that the summer season partly overlaps the rainy season and advises visitors from late June to late July to check the forecast (VisitKorea). July is the wettest month: see Korea in July.

Typhoons in June

The Korea Tourism Organization says June to October is typhoon season (VisitKorea). June is early in the season. KMA's 1991–2020 normal is 1.7 typhoons forming in the North Pacific in June, and 0.3 affecting Korea (KMA). For the rest of the season, see Korea in August.

What to wear

  • Breathable clothes. The KTO recommends breathable clothing, sun protection products, and an umbrella or raincoat for summer.
  • A compact umbrella. Rain becomes likely from the last week of the month.
  • Shoes that dry quickly. Sandals and canvas shoes soak through in heavy rain.
  • A thin layer. Air conditioning on the subway and in cafés is strong.

Holidays in June 2027

Date What happens
Sunday 6 June Memorial Day, 현충일HyeonchungilMemorial Day. KASI lists no substitute holiday.
Wednesday 9 June Dano, 단오DanoDano festival. A traditional day, not a public holiday.

Source: KASI calendar data 2027. Memorial Day honors the soldiers and civilians who died for the country, with the largest ceremony at the National Cemetery in Seoul (VisitKorea). Because 6 June 2027 is a Sunday, it does not create a long weekend. Banks and government offices close on public holidays.

Events and festivals

No organizer had published 2027 dates when this page was written. These are the 2026 dates, to show the usual timing.

2026 event Place 2026 dates Organizer
Gangneung Danoje Festival, 강릉단오제Gangneung DanojeGangneung Danoje Festival Namdaecheon Stream, Gangneung 15–22 June Gangneung Danoje Festival Committee
Han River swimming pools open Ttukseom, Yeouido and four other Han River parks, Seoul opened 19 June; ran to 30 August Seoul Metropolitan Government

Sources: Danoje festival site and Seoul Metropolitan Government. The Danoje festival is the most prominent celebration of Dano and is inscribed on UNESCO's Intangible Cultural Heritage list (VisitKorea). Dano falls on the fifth day of the fifth lunar month, which is usually in June. KASI puts it on 9 June in 2027, so the festival will probably be in the same week, but the committee had not announced the 2027 dates. The Seoul pools charged 5,000 won for adults and 3,000 won for children in 2026, and the 2027 season is not announced. For other events, see the Korea Tourism Organization's festival listings.

Crowds and prices

The Korea Tourism Organization names July to August as a peak season (VisitKorea), so June is a good month to travel before prices rise. Many stores hold sales from June to August (VisitKorea).

Where to go

  • Seoul: palaces and the Han River before the rainy season arrives. See the Seoul guide.
  • Gangneung: the Danoje festival and the east coast. See the Gangneung guide.
  • Jeju: warm, but 171.2 mm of rain. Plan indoor options. See the Jeju guide.

Questions and answers

When does the rainy season start in Korea?

Normally around 19 June on Jeju, 23 June in the south and 25 June in Seoul (KMA). The real date changes each year.

Is June a good time to visit Korea?

Yes, especially before the rainy season starts. It is warm, with a Seoul average high of 27.6°C, and it is before the peak summer prices and heat.

Is there a holiday in June?

Memorial Day, on Sunday 6 June 2027. No substitute holiday is listed.

Previous: Korea in May. Next: Korea in July.

Official sources (12)

Last checked October 20, 2026Next check due November 19, 2026

Rules can change. Confirm on the official site before you travel.

Next stepKorea in July 2027: Rainy Season, Heat and the Mud Festival

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