Korean Jangma at a Glance
Jangma (Korea's summer rainy season) is Korea's seasonal rainy period that arrives in early summer. It usually begins between late June and July and lasts for several weeks.
Many first-time visitors imagine constant rain throughout the season, but that's not actually how Jangma works. Some days bring heavy rainfall, while others are surprisingly sunny, and sudden downpours can quickly give way to clear skies.
As summer approaches, it's common to hear Koreans ask, "When will Jangma begin?" People start checking the weather forecast more often, carrying umbrellas, and making indoor plans whenever rain is expected.
Jangma is more than just a period of frequent rain. It shapes everyday life, influences travel plans, and marks the beginning of Korea's hot and humid summer.
Raindrops on a window during Korea's Jangma season.
What Is Jangma?
Jangma (Korea's summer rainy season) is a seasonal weather pattern that brings frequent rainfall during early summer. It develops when cool northern air meets warm, moisture-filled air from the south, creating a stationary rain front over the Korean Peninsula.
You don't need to understand all the meteorology behind it, but this is why Korea experiences a rainy season at around the same time almost every year.
What is Jangma?
Jangma is not unique to Korea. Similar seasonal rainy periods occur in several parts of East Asia. In Korea, however, it is one of the most recognizable signs that summer has officially arrived.
When does Jangma usually begin?
The exact timing changes slightly each year, but it usually starts between late June and July.
How long does it last?
Jangma typically lasts for several weeks, although both its starting and ending dates vary from year to year.
Does it rain every day?
Not necessarily.
Many people imagine that the rainy season means endless rain from morning to night, but that's a common misconception. Some days bring steady rainfall, while others stay completely dry. It's also common to experience a sudden downpour that stops just as quickly as it began.
Because of this, your travel plans don't necessarily have to change every day during Jangma.
Why does Korea feel so hot during Jangma?
Rain doesn't always make the weather feel cooler.
During Jangma, humidity rises dramatically, making the air feel heavy and sticky. Sweat evaporates more slowly, so even moderate temperatures can feel much hotter than they actually are.
That's why many Korean households use dehumidifiers along with air conditioners during this time of year. Reducing humidity often makes the indoors feel much more comfortable than simply lowering the temperature.
How Do Koreans Spend the Rainy Season?
Life in Korea doesn't come to a stop just because Jangma begins. Instead, people naturally adjust their daily routines to the weather. As rainy days become more frequent and humidity rises, many choose indoor activities over spending long hours outside.
Korea offers plenty of places to enjoy even when it's raining. Besides cafés and shopping malls, families often visit children's cafés, museums, exhibitions, and other indoor activity centers. Since Jangma often overlaps with the summer vacation season, many travelers also include indoor attractions in their itineraries in case the weather changes unexpectedly.
My family isn't much different.
My oldest son looks forward to summer every year because he loves catching insects and playing in the water. But once Jangma begins, it's harder to spend an entire day outdoors, so we often end up visiting shopping malls, exhibitions, or indoor activity centers instead.
The funny thing is that almost everyone has the same idea. On rainy days, those places are usually much busier than usual.
Of course, the kids don't spend the whole season indoors.
We live in a house with a small yard, and every summer we set up a small inflatable pool. Even when it's raining lightly, the children happily splash around outside. Seeing them reminds me of my own childhood, when my friends and I would run around in the rain without worrying about getting wet.
Moments like these make Jangma feel less like an inconvenience and more like a part of what makes summer in Korea memorable.
How Should You Prepare for Traveling During Jangma?
If you're planning a trip to Korea in summer, you may wonder whether Jangma will ruin your travel plans.
In my opinion, there's no reason to avoid visiting Korea during the rainy season. Jangma doesn't mean nonstop rain every day, and there are often plenty of opportunities to enjoy outdoor attractions between showers.
That said, it's still a good idea to stay flexible. Heavy rain can arrive unexpectedly, and some days may remain cloudy or wet from morning to evening.
Should you visit Korea during Jangma?
I'd say yes.
If you've experienced tropical showers in Southeast Asia, Korea's rainy season may feel a little different. Tropical showers usually arrive suddenly, pour heavily for a short time, and then disappear. Jangma, on the other hand, tends to bring longer periods of rain that may stop and start throughout the day.
Another surprise for many visitors is the humidity. Even when it's raining, the weather often remains warm and extremely humid, so it can feel sticky rather than refreshingly cool.
I once visited Jeju Island during Jangma with my family.
Before the trip, I checked the weather forecast and planned both outdoor and indoor activities. On rainy days, we visited places like an aquarium and other indoor attractions, and whenever the weather cleared up, we headed back outside.
Having a flexible itinerary made the trip much more enjoyable than worrying about the rain.
What Should You Pack for Jangma?
- ☔ A compact umbrella or lightweight rain poncho
- 👟 Comfortable shoes that won't be a problem if they get wet
- 🧥 A light jacket or cardigan for heavily air-conditioned buildings
- 🏛️ One or two indoor attractions added to your travel plan
- 🗓️ A flexible itinerary that can easily change with the weather
During Jangma, you'll probably experience at least one day of heavy rain.
Because of that, you don't necessarily need expensive waterproof shoes. In many cases, it's more practical to wear comfortable shoes that are easy to dry and that you won't mind getting wet.
And don't worry if you forget to bring an umbrella.
Convenience stores are everywhere in Korea, and most of them sell umbrellas and inexpensive rain ponchos. When rain is in the forecast, many stores even stock extra umbrellas, making it easy to pick one up if you suddenly get caught in a shower.
The key to enjoying Korea during Jangma isn't avoiding the rain altogether—it's being prepared to adapt your plans. If you combine outdoor sightseeing with a few indoor options, you'll still be able to enjoy everything Korea has to offer during the rainy season.
After Jangma, Korea's Real Summer Begins
When Jangma comes to an end, many Koreans say, "Now the real summer begins."
The humidity gradually eases, but the intense sunshine and heat take over. This is also when Boknal (the hottest days of summer according to the traditional Korean calendar) arrives, and many people enjoy nourishing foods such as Samgyetang (Korean ginseng chicken soup) to help them cope with the heat.
When I was a child, the news often showed people making their way to school or work through flooded streets after heavy rain. Today, public safety receives much more attention, but Jangma still has a significant impact on everyday life in Korea.
Personally, I'm not a big fan of hot weather.
Summer can feel exhausting at times, but my children absolutely love it. As soon as the rainy season ends and blue skies return, they're outside catching insects, playing in the water, and making the most of their summer vacation.
Watching them reminds me that every season has its own charm.
Jangma may sometimes feel inconvenient, but it also reveals how Koreans adapt to nature and embrace the changing seasons. In many ways, it's an experience that offers visitors a deeper understanding of everyday life in Korea—not just the weather itself.
COMING UP NEXT
Why Do Koreans Eat Pajeon and Makgeolli When It Rains?
Why do rainy days make so many Koreans crave pajeon and makgeolli?
There's more to it than you might expect.
Discover the story behind this unique rainy-day tradition.
RELATED ARTICLES
Why Do Koreans Celebrate Boknal? Korean Summer Traditions, Samgyetang, and Health Tips
Why Koreans Eat Samgyetang on the Hottest Days – Benefits, Easy Recipe, and Summer Health Tips