Korea has four distinct seasons and a large daily temperature swing in two of them. The forecast you read for the city is not what a riverside festival ground feels like at nine in the evening.
Two structural facts explain most of what follows. First, festival grounds are open sites — riverbanks, plazas, fields — with far less shade and shelter than a city street. Second, the best part of the programme is usually after dark, which in spring and autumn is the coldest part of the day you will be outside for.
Spring (April–May)
The best festival weather and the least predictable. Afternoons are mild, mornings and evenings are cold, and a windy day beside a river feels ten degrees colder than the number on your phone.
Cherry blossom festivals sit at the front of this season, which means large crowds in weather that has not fully settled. A day that begins at 8°C and reaches 20°C by three in the afternoon is normal, and so is a sudden cold, wet day dropped into the middle of a warm week.
What works: a light jacket you are willing to carry once it warms up, and something with a hood. A scarf does more than its bulk suggests in river wind.
Yellow dust and pollen. Fine dust days occur through spring and are reported in every weather app. If you are asthmatic or sensitive, carry a KF94 mask — they are sold in every convenience store and pharmacy, and on a bad day you will see locals wearing them.
Summer (June–August)
Hot and humid, with the monsoon through much of July. Rain is heavy and short rather than steady drizzle: a downpour that soaks you in ninety seconds, then sun.
The heat is the real constraint. Late July and August regularly sit above 30°C with high humidity, and a festival ground with no shade at two in the afternoon is genuinely hard going. Heat, not rain, is the most common reason visitors leave a summer festival early.
What works: light, loose, quick-drying clothes rather than cotton that stays wet. A packable raincoat rather than an umbrella — summer rain arrives with wind, and umbrellas in a crowd are a nuisance to everyone including you. A hat, a refillable water bottle, and a small towel, which is what Koreans carry and which turns out to be the most useful thing in the bag.
Water festivals are a category of their own. At Boryeong Mud Festival and similar events you will get soaked and muddy on purpose, so bring clothes you do not care about, sandals with a heel strap, and a dry bag or a sealed plastic bag for your phone. Changing facilities exist at the big water festivals and queues for them are long.
Autumn (September–November)
The main festival season and the biggest trap in this guide. The afternoon is warm and the evening is not. Many autumn festivals hold their best programme after dark — lantern floats, fireworks, the closing stage — which is exactly when the temperature falls.
October is the clearest example: an afternoon at 22°C and an evening near 10°C on the same day, and colder again beside water. Visitors dressed for the afternoon spend the evening programme cold, then leave before the part they came for.
The rule that works: dress for the afternoon, pack for the evening. One warm layer in a bag saves the night. A thin down or synthetic jacket that compresses to nothing is the ideal object here.
By late November the calculation changes again — the daytime is cold too, and the advice below for winter starts to apply.
Winter (December–February)
Cold, dry and windy. Seoul sits below freezing for much of January, and the interior and the mountains are colder still. Ice festivals, trout festivals and winter light festivals are worth the trouble if you are prepared for them and miserable if you are not.
The specific difficulty is that these events involve standing still outdoors, often on ice or beside a river, for a couple of hours. That is a different problem from walking around a city in winter, where you generate heat and can step into a shop.
What works: layers rather than one thick coat, gloves, and something covering your ears. Thermal underlayers are sold everywhere and are worth buying if you did not bring any. Waterproof boots if the festival involves ice or snow, because wet feet end the day.
Hand warmers (핫팩, hotpaek) are sold in every convenience store for about a thousand won and are the cheapest comfort you will buy on the trip. Buy several. They also work in shoes.
What festival grounds do not have
This is the part that changes what you pack.
- Cloakrooms. There is almost never anywhere to leave a coat or a bag. Coin lockers are at train and subway stations, not on the ground.
- Seating. Some events have stage seating; most have kerbs and grass. A thin sit-mat weighs nothing and is what locals bring.
- Shade. Trees if you are lucky. Marquees are usually over the stalls, not over you.
- Free drinking water. Buy it outside the ground where it is cheaper, or bring a bottle.
Things that apply all year
- Shoes. Gravel, grass, riverbank. Closed shoes, comfortable for six hours of standing, and not new. This matters more than any other item here.
- A bag you can carry all day. You will be given flyers, you will buy food, and there is nowhere to put any of it down.
- Cash in a pocket, not at the bottom of the bag. Stall queues move fast and many stalls take cash only.
- Sun. Spring and autumn midday sun is stronger than it feels in cool air, and an open festival ground has nowhere to hide from it.
- Something to sit on and something to wipe with. A sit-mat and wet wipes cover the two things the ground reliably lacks.
Buying what you forgot, in Korea
You do not need to pack for every contingency, because most of the gaps are fillable here cheaply and quickly.
Convenience stores carry umbrellas, disposable raincoats, hand warmers, masks, plasters and socks. There is one near every station and usually one near a festival entrance.
Daiso — the cheap variety chain, in every town of any size — has sit-mats, gloves, hats, rain covers and small towels for a couple of thousand won each.
Outdoor clothing shops are everywhere in Korea, which is a country that takes hiking seriously, and a warm layer bought at one will outlast the trip.
What is genuinely worth bringing from home is only the shoes, because a comfortable pair you have already broken in is the one thing you cannot buy at short notice, and because Korean shops carry a narrower range of large sizes than you may be used to.
Reading the forecast for a festival, not a city
Weather apps report the city. A festival is usually at a specific site with its own conditions, and three adjustments are worth making.
Water makes it colder and windier. A large share of Korean festivals are held on riverbanks and lakesides, and the evening there runs several degrees below the city reading.
Mountains and inland valleys are colder than the coast in winter and swing harder between day and night in spring and autumn.
Look at the hourly forecast, not the daily high. The daily high tells you about two in the afternoon. You want the number for the hour the closing programme runs.
Each festival page on this site lists the season and, where we have checked it, the opening hours. When the hours are blank they are blank because we could not verify them — but the seasonal advice above still holds, and the safe assumption for any Korean festival is that the good part happens after dark and it will be colder then than you expect.
Questions worth asking
How cold does a Korean autumn festival get after dark?
Much colder than the afternoon. A 22°C October afternoon can fall near 10°C by the evening programme, so bring a layer you can carry all day.
Is an umbrella or a raincoat better?
A packable raincoat. Summer rain arrives with wind, and festival grounds are crowded enough that umbrellas become a nuisance.
What shoes should I bring?
Closed shoes you can stand in for six hours. Most festival grounds are gravel, grass or riverside dirt rather than pavement.
Is there anywhere to leave a coat or a bag at a festival?
Usually not. Lockers exist at train stations and subway stations, rarely on a festival ground, so plan to carry whatever you bring.
LAST UPDATED · Sep 8, 2026