Best Time to Visit Korea (2026–27): Month-by-Month Weather, Crowds and the Holiday Dates to Avoid
If you only want the short answer: the best months to visit Korea are April–May and late September–early November. Those are the two windows when Seoul is neither freezing nor sticky, rain is light, and the country is at its most photogenic, with cherry blossoms in spring and red-and-yellow mountains in autumn.
The longer answer depends on what you can put up with. Winter is cold but clear and cheap outside the holidays. Summer is hot, humid and wet, but it is school-holiday season in much of the world and the beaches are open. And a few specific weeks, Korean and neighbouring-country holidays, are worth avoiding whatever the weather. This guide sets out the real numbers month by month and the dates to plan around in 2026–27.
• Best overall: mid-April to May, and late September to early November
• Best for low prices: January to early March (avoid Lunar New Year week)
• Most difficult: July, the heart of the rainy season, with about 414 mm of rain in Seoul
• Dates to avoid in 2027: Lunar New Year, February 6–9, and Chuseok, September 14–16
Seoul month by month: the official numbers
These are the Korea Meteorological Administration’s 1991–2020 averages for Seoul. Busan and the south coast are two or three degrees milder in winter; Jeju is milder still. The “verdict” column is ours.
| Month | High / low | Rain | Verdict |
|---|---|---|---|
| January | 2.1°C / −5.5°C (36 / 22°F) | 17 mm | Coldest month, clear skies, cheap. Good for skiing and ice festivals. |
| February | 5.1°C / −3.2°C (41 / 26°F) | 28 mm | Still winter. Lunar New Year in 2027 falls on February 6–9. |
| March | 11.0°C / 1.9°C (52 / 35°F) | 37 mm | Cold mornings, first blossoms in the south late in the month, fine-dust days start. |
| April | 17.9°C / 8.0°C (64 / 46°F) | 73 mm | Cherry blossoms. Busy and a little pricier, but beautiful. |
| May | 23.6°C / 13.5°C (74 / 56°F) | 104 mm | Arguably the best month. Warm, green, long days. |
| June | 27.6°C / 18.7°C (82 / 66°F) | 130 mm | Early June is fine; the rainy season usually starts in the last third. |
| July | 29.0°C / 22.3°C (84 / 72°F) | 414 mm | Wettest month. Humid, with heavy downpours. |
| August | 30.0°C / 22.9°C (86 / 73°F) | 348 mm | Hottest month, typhoon risk, local holiday crowds at beaches. |
| September | 26.2°C / 17.7°C (79 / 64°F) | 142 mm | Humid early, lovely late. Watch for Chuseok. |
| October | 20.2°C / 10.6°C (68 / 51°F) | 52 mm | Crisp, dry and clear. Autumn leaves start on the mountains. |
| November | 11.9°C / 3.5°C (53 / 38°F) | 51 mm | Leaves in the city early on; feels like winter by the end. |
| December | 4.2°C / −3.4°C (40 / 26°F) | 23 mm | Cold and dry, Christmas lights, winter festivals. |
Spring (April–May): blossoms, then the best weather of the year
Cherry blossom season is the single most popular time to visit Korea, and it is short. In Seoul the trees typically flower in the first half of April: the long-term average flowering date is April 8, with full bloom about two days later. But the date moves with the weather. In 2026 the KMA declared Seoul’s blossoms open on March 29, ten days earlier than average. Blossoms open in Jeju and Busan a week or more before Seoul.
What that means for planning:
- If blossoms are the point of the trip, book a window rather than a day: late March to mid-April covers most years in Seoul.
- Watch the KMA and news forecasts from early March; they tighten as the date gets closer.
- Even if you miss them, mid-April to the end of May is still excellent: warm afternoons, cool evenings, everything green.
The one spring downside is fine dust (미세먼지), which is generally worst from late winter into spring. Check the air quality in a weather app each morning; on “bad” days locals wear KF94 masks, sold in every convenience store.
Summer (June–August): rain first, then heat
Korean summer comes in two parts. The rainy season (장마, jangma) usually arrives in the last third of June and lasts until late July. It is not constant rain, but it brings heavy, sudden downpours, and July averages over 400 mm in Seoul, eight times as much as October. After it ends, August is the hottest month, with highs around 30°C and high humidity, plus the chance of a typhoon reaching the peninsula in August or September.
Summer does have points in its favour. Beaches in Busan and Jeju are open, the mountain valleys are cool, and indoor Seoul (malls, museums, cafes and the subway) is heavily air-conditioned. If summer is the only time you can travel, front-load outdoor sightseeing into early mornings, carry a compact umbrella, and keep a flexible day for the weather.
Autumn (late September–November): the other best season
October is the driest and clearest month of the year in Seoul, with about 52 mm of rain and comfortable daytime temperatures. The colours arrive from the north and from the mountaintops down: the high peaks turn in early-to-mid October, Seoul’s own mountains and palaces from late October, and the city’s street ginkgo trees from late October into the first half of November. For a detailed picture of the late-autumn slide into winter, see our Seoul in November guide.
Two things can spoil autumn: Chuseok (see below) and China’s National Day holiday at the start of October, when popular sights in Seoul and Jeju get noticeably busier.
Winter (December–February): cold, clear and cheap
Seoul winters are colder than many visitors expect. January averages a low of −5.5°C, and wind makes it feel colder. But winter is also the clearest, driest season, hotel prices drop outside Christmas and Lunar New Year, and there are things you can only do now: skiing two hours from Seoul, ice-fishing festivals in Gangwon Province, snow on palace roofs, and hot street snacks on every corner. Pack a proper padded coat, gloves and a hat, and plan long indoor stretches for the afternoons. Our Korea in winter guide has the packing list and festival dates.
The dates to avoid in 2026–27
Weather aside, these are the weeks when trains sell out, prices jump or sights are packed:
- Lunar New Year (Seollal) 2027: February 6–9. Lunar New Year’s Day in Korea is Sunday, February 7, a day later than in China, because the new moon arrives just after midnight Korean time. The holiday runs Saturday to Monday, with Tuesday, February 9 as a substitute holiday. Millions of people travel to their hometowns, KTX and express-bus tickets disappear, and some small restaurants close.
- Chuseok 2027: September 14–16 (Chuseok Day is Wednesday, September 15). The same pattern as Seollal: transport sells out, and some shops and restaurants close for a day or two. Palaces and big attractions stay open and can be busy.
- Japan’s Golden Week (around April 29 to May 5) and China’s National Day holiday (from October 1, usually a week): not Korean holidays, but Seoul, Busan and Jeju fill up with visitors and hotel prices rise.
- Christmas and New Year’s Eve in Seoul: festive and fun, but restaurants book out and Myeongdong is shoulder to shoulder.
If your trip includes a long train journey, book as early as you can; our KTX booking guide explains the two-month booking window and how the holiday sales work.
So which month should you pick?
- First trip, flexible dates: May or October.
- Cherry blossoms: the first half of April in Seoul, a week earlier in the south; leave a few days of slack.
- Autumn colour: mid-October in the mountains, late October to early November in Seoul.
- Tight budget: January or early March, avoiding the Lunar New Year week.
- Beach time: late August to mid-September in Busan or Jeju, watching typhoon forecasts.
Whatever month you choose, our Korea trip cost guide shows what a day really costs, and the five-day Seoul itinerary gives you a plan that works in any season.
Climate figures: Korea Meteorological Administration 1991–2020 normals for Seoul. Cherry blossom dates: KMA press release, March 29, 2026. Lunar New Year 2027 date: new moon of February 6, 2027 at 15:56 UTC (NASA lunar phase tables), which is 00:56 on February 7 in Korea; holiday dates from published 2027 Korean holiday calendars. Holiday dates and substitute holidays can be confirmed on official government announcements before you travel.
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