South Korea is renowned for its distinct four seasons: spring, summer, autumn, and winter.
Each brings unique experiences, but summer stands out due to the monsoon season, known locally as "jangma." For foreigners residing in or planning to move to Korea, understanding this season is crucial.
The monsoon impacts daily life, from commuting to leisure activities, and being prepared can make the experience manageable and even enjoyable.
What is 'Jangma'? Understanding Korea’s Monsoon Season
"Jangma (장마)" refers to the East Asian monsoon season in Korea, typically occurring from late June to late July. During this period, the country experiences prolonged rainfall due to the collision of hot, humid air masses from the Pacific with cooler air from the north. This results in a stationary front that brings continuous rain over several weeks.
Unlike sporadic showers, jangma is characterized by persistent, heavy rainfall, high humidity, and occasional thunderstorms. It's a significant climatic event that influences agriculture, infrastructure, and daily routines.
2025 Monsoon Forecast: When and Where Will It Rain the Most?
According to the Korea Meteorological Administration (KMA), the 2025 monsoon season is expected to start earlier and be more intense than usual. Here's a regional breakdown:
Central Regions (including Seoul, Gyeonggi, Gangwon, Chungcheong): Commencing around June 25, also lasting about 31 days.
Southern Regions (e.g., Busan, Gwangju, Daegu): Beginning around June 23, continuing for about 31 days.
- Jeju Island: Starting around June 19, lasting approximately 32 days.
Rainfall during this period is projected to be up to 1.5 times higher than average, raising concerns about potential flooding and landslides.
What to Expect During Monsoon Season
🔳 Increased Rainfall and Humidity
Expect frequent, heavy downpours, often exceeding 100mm per hour. Humidity levels can soar, making the air feel sticky and uncomfortable.
🔳 Potential for Flooding and Landslides
Urban areas may experience flash floods due to overwhelmed drainage systems. In mountainous regions, the risk of landslides increases.
🔳 Transportation Disruptions
Heavy rains can lead to delays or cancellations in public transportation. Roads may become slippery or flooded, affecting both drivers and pedestrians.
🔳 Health Considerations
The combination of heat and humidity can exacerbate health issues. Mold growth in homes is common, and mosquito populations may increase, raising the risk of insect-borne diseases.
How to Prepare for Monsoon Season in Korea
🔳 Stay Informed
Regularly check weather updates from reliable sources like the KMA. Many Korean weather apps offer English-language options.
🔳 Equip Yourself with Rain Gear
Invest in a sturdy umbrella, waterproof clothing, and non-slip footwear. Having a waterproof bag or cover for electronics is also advisable.
🔳 Home Maintenance
Ensure that windows and doors are sealed properly to prevent leaks. Clean gutters and drainage systems to avoid water accumulation. Consider using a dehumidifier to combat mold growth indoors.
🔳 Plan Your Commute
Allow extra time for travel, as delays are common during heavy rains. Consider alternative routes or transportation methods if your usual path is prone to flooding.
🔳 Health Precautions
Keep your living space dry and well-ventilated. Use mosquito repellents and install screens on windows to prevent insect entry.
Useful Apps and Resources
Korea Meteorological Administration (KMA): Provides up-to-date weather forecasts and alerts.
KakaoMap and Naver Map: Offer real-time traffic updates and can help identify flooded areas.
Emergency Ready App: An English-language app by the Ministry of the Interior and Safety, offering emergency alerts and safety tips.
Understanding Korea’s Four Seasons: More Than Just Weather
Korea’s seasonal changes are not just about temperature—they shape daily life, fashion, food, festivals, and even your utility bills. Here’s a quick breakdown:
Spring (March to May): Cherry blossoms, mild weather, yellow dust alerts
Summer (June to August): Hot and humid, monsoon in late June-July
Autumn (September to November): Crisp air, colorful foliage, cultural festivals
Winter (December to February): Cold, sometimes snowy, with icy winds
For expats, adjusting to these transitions takes time. Air conditioners in summer and ondol (floor heating) in winter are essentials, and the rainy season is often the most unexpected shift.
Monsoon Memories: What Happened in 2023 and 2024?
In 2023, Seoul recorded one of the heaviest downpours in a decade, causing subway shutdowns and major traffic jams. In 2024, landslides in Gangwon-do led to temporary evacuations. These events remind us that jangma isn’t just rain—it’s a seasonal challenge that can turn into an emergency.
Real Stories from Foreigners
Many expats share how surprised they were by the sheer volume of rain. One Canadian living in Daegu said: “I thought I was prepared, but my sneakers got soaked daily until I bought waterproof shoes.”
A teacher in Seoul added: “I didn't expect mold to grow so quickly in my apartment—it only took a few days!”
Such experiences show why preparation isn’t just practical—it’s essential for comfort and safety.
Regional Differences: Seoul vs Busan vs Jeju
Seoul (Central): Urban flooding is a concern; watch for underpasses and river-side roads.
Busan (Southern): Coastal winds plus rain; use extra care near beaches or cliffs.
Jeju (Island): First to get the monsoon; known for sudden, heavy rain and poor visibility on roads.
Each region experiences jangma differently, so tailor your preparation accordingly.
Cultural Insights: How Koreans View Rain
Interestingly, rain in Korea isn’t always seen as gloomy. It’s often romanticized in dramas, and some believe rain on a wedding day brings good luck. You might notice more people at cafés, lingering over a hot drink as they watch the rain fall. Embrace it like a local!
By understanding both the challenges and the charm of Korea’s rainy season, you’ll be well-prepared to not just survive, but thrive—even when the skies are grey.
Indoor Activities for Rainy Days
Rain doesn’t mean boredom. Korea has plenty of indoor fun:
Visit jjimjilbangs (Korean spas)
Explore museums or aquariums
Try Korean cooking classes
Enjoy a movie or café day in hip neighborhoods like Hongdae or Seomyeon
Turn the rainy season into an opportunity to enjoy Korea from a different angle.
Frequently Asked Questions (FAQ) About Korea’s Monsoon Season
Q. Does it rain all day during the monsoon season? Not necessarily. While the monsoon season brings frequent and heavy rains, it's common to have intermittent breaks. You might experience a few hours of intense rain followed by clearer skies. However, the humidity remains high throughout the season.
Q. What kind of clothing is best during this season? Lightweight, quick-drying clothes are ideal. Many recommend wearing synthetic fabrics that wick moisture away. Footwear like waterproof sandals or Crocs are popular choices among expats. Also, carrying a compact umbrella is a must.
Q. Is mold a problem during the monsoon? Yes, the combination of high humidity and warmth creates an environment conducive to mold growth. It's advisable to ventilate your living space regularly and consider using a dehumidifier.
Q. Are there any health concerns to be aware of? Apart from mold-related issues, the increased mosquito activity can be a concern. Use insect repellents and ensure window screens are intact. Also, sudden temperature changes between outdoors and air-conditioned interiors can lead to colds, so carry a light jacket.
Q. How does the monsoon affect daily life and transportation? Heavy rains can lead to localized flooding, affecting roads and public transportation. Expect potential delays and plan ahead.
Q. Are there any cultural aspects related to the rainy season? Yes! In Korea, rainy days are often associated with eating pajeon (green onion pancakes) and drinking makgeolli (rice wine). It’s a popular comfort food combo that matches the rainy mood.
Final Tips: Staying Safe, Dry, and Ready
Monitor Weather Reports: Stay ahead by checking forecasts daily.
Prepare an Emergency Kit: Include essentials like bottled water, non-perishable food, flashlight, batteries, and a first-aid kit.
Stay Connected: Keep your phone charged and have backup power sources in case of outages.
Community Engagement: Join local community groups or online forums for real-time updates and support.
