My glasses fogged the instant I stepped off the train, and my umbrella was still dripping under my desk. That’s jangma (장마, jangma, Korea’s summer monsoon) — the rain front that parks over the peninsula from late June into late July. In 2026 it came late and hit hard.
If you’ve just arrived in Korea for the summer and keep wondering why the sky won’t stop opening up, this is your answer, and it isn’t going anywhere for a few more weeks. I’m a Seoul office worker, and I want to explain jangma the way I actually live it — the wet commute, the laundry that never dries, and the one rainy-night ritual that almost makes the whole thing worth it.
When is jangma, and why is 2026 so unpredictable?
Jangma normally runs from late June to late July, creeping up from the south as a stalled rain front. This year cold air held that front back, so the monsoon started late. For the central region, including Seoul, it’s been running from roughly late June to around July 26, and the Korea Meteorological Administration expects the rain to linger into early August. One thing that surprises newcomers: the KMA no longer announces fixed official start and end dates, because the rainfall has simply become too erratic to pin to a calendar.
The signature of 2026 is the guerrilla downpour (게릴라성 호우, gerillaseong hou, a sudden, intensely localized cloudburst). These bursts soak one district while the street two blocks over stays bone dry, and because this July is leaning both wetter and hotter than usual, a steamy sunny afternoon and a thunderous evening flood can land on the same day. It turned dangerous earlier this week. On July 8–9, central Korea took up to 50 mm of rain an hour in the Chungcheong provinces, with more than 220 mm piling up in Daejeon and Cheongju. Boeun county evacuated 82 people over fears a reservoir would overflow, an embankment failed in Cheongju and forced a nursing home to clear out, and authorities logged 145 damage reports overnight — with the rain reaching Gyeonggi, the greater Seoul area, too.
| 2026 jangma at a glance | |
|---|---|
| Where | Central Korea, including Seoul (and nationwide) |
| Timing | Started late — roughly late June to about July 26, rain likely into early August |
| This year’s signature | Guerrilla downpours; leaning wetter and hotter than usual |
| July 8–9 peak | Up to 50 mm/hour (Chungcheong); 220+ mm total in Daejeon & Cheongju |
What does jangma actually feel like day to day?
Damp. That’s the honest one-word answer — a low, sticky dampness that works its way into everything you own. My laundry (빨래, ppallae, the washing) hangs on the drying rack for two days and still comes off smelling sour, so half the country runs a dehumidifier or just gives up and uses the dryer. A faint bloom of mold (곰팡이, gompangi) creeps back into the bathroom grout no matter how often I scrub it, and the entryway becomes a permanent pile of shoes that never fully dry.
Then there’s the commute. I’ve written before about my unavoidable 33-minute subway ride, and in jangma it turns into an obstacle course. Everyone boards clutching a wet, folded umbrella, the windows fog, your glasses fog, the whole car smells of damp fabric, and you spend the ride quietly negotiating so nobody drips on anybody. You also learn to read the sky before you leave the apartment, because getting caught outside when a guerrilla downpour opens up means walking into the office looking like you swam there.
Why do Koreans eat pajeon and makgeolli when it rains?
Here’s the part that redeems the whole soggy season. The moment it starts pouring, a huge number of Koreans get the exact same craving: pajeon (파전, pajeon, a savory green-onion pancake from the jeon / buchimgae family of pan-fried batter dishes) with a bowl of makgeolli (막걸리, makgeolli, an unrefined, milky rice wine, cloudy from its chalky sediment and usually 6–9% ABV). Honestly, I never once thought about why until a foreign coworker asked me point-blank — and I realized I had no answer. It was just what you do.
Two explanations get passed around. The sensory one: the sizzle of batter hitting a hot, oiled pan sounds a lot like rain against a window, so somewhere along the way the two got wired together in our heads. The historical one: farmers couldn’t work flooded fields on rainy days, so they stayed in, fried up jeon from whatever was in the kitchen, and drank makgeolli — and the habit outlived the farming. There’s also a popular belief that gray weather lowers your serotonin, and that the amino acids and B vitamins in pajeon plus a little makgeolli nudge your mood back up. I’d file that under folk wisdom rather than settled science, but I won’t pretend the combination doesn’t make a dreary evening better. (For the record, this is strictly a rainy-day thing — not to be confused with the dog-days custom of eating hot samgyetang to fight the summer heat. Different season, different logic entirely.)
How do you get through jangma? A few practical notes
Assume you will get wet, and plan around that. A flimsy convenience-store umbrella will fold inside out in the first real gust, so it’s worth owning one proper umbrella and, if you walk any part of your commute, a pair of rain boots — plenty of Koreans keep them parked by the door all July. Check the forecast every single morning, not out of habit but because the sky genuinely shifts hour to hour during jangma; I glance at it before I even decide which shoes to wear. Most importantly, leave your phone’s emergency alerts switched on. When rivers and reservoirs rise, the government pushes flood and evacuation warnings straight to your handset, and the KMA’s own forecast service or a weather map like Naver’s will show you exactly where the next rain band is heading. In a season built on guerrilla downpours, that fifteen-minute head start is the whole difference between a dry evening and a ruined one.
FAQ
When is monsoon season (jangma) in Korea?
Jangma usually runs from late June to late July across the peninsula. In 2026 it started late, and for central Korea including Seoul it has run from roughly late June to around July 26, with rain expected to linger into early August.
Why do Koreans eat pajeon and makgeolli on rainy days?
Two reasons get passed around: the sizzle of frying pancake batter sounds like falling rain, and historically farmers stuck indoors on wet days would fry jeon and drink makgeolli. It stuck as a comfort-food ritual, and many people also swear it lifts a gloomy mood.
Is it safe to travel in Korea during the monsoon?
Cities keep running through jangma, but sudden guerrilla downpours can flood streets and underpasses fast. Keep your phone’s emergency alerts on, check the forecast daily, and stay away from rivers and low-lying areas during heavy-rain warnings.
What still gets me is how invisible all of this is from the inside. I never questioned the pajeon craving until someone asked, and I never noticed I read the sky every morning until I tried to explain it out loud. Jangma isn’t a postcard version of Korea — it’s mold in the grout, a fogged-up train, and an umbrella dripping under a desk. But it’s also the one stretch of the year where a rainy evening arrives with a built-in reason to fry something, pour something cloudy, and listen to the pan sizzle in almost perfect time with the weather outside. If you’re here for the summer, don’t fight it. Buy the boots, watch the sky, and when it finally pours, do what we do.