8. Packing: Long Puffers and Heat-Tech

Korea's Four Distinct Seasons

South Korea experiences four dramatically different seasons, and packing wrong can make or ruin your trip. Unlike many travel destinations where "layers" is a sufficient answer, Korea's seasonal extremes require specific clothing knowledge.

Winter (December–February): Dress for Siberian Wind

Seoul winters are brutal. The city sits at the end of a cold Siberian air corridor, and wind chill makes actual temperatures feel significantly colder than the thermometer shows. Average temperatures are -5°C to 5°C (23–41°F), but with wind it can feel like -15°C (-5°F) in exposed areas like the Han River or Bukhansan mountain.

Essential Winter Items:

• Long Puffer (Long Padding / 롱패딩): The Korean "Long Padding" coat that extends to the knee or ankle is the single most important winter item. Koreans adopted this style specifically because Seoul winters require full-body coverage. Regular hip-length coats leave your legs exposed to wind. If you do not own one, consider buying one in Korea — they are cheaper here than in Western markets.
• Uniqlo Heat-Tech: Korean winters popularized thermal underwear. Uniqlo's Heat-Tech (available at every Uniqlo location in Seoul) is the gold standard — it is thin enough to layer under normal clothes but dramatically increases warmth retention.
• Neck gaiter or scarf: Wind protection for the neck is critical. A tube scarf (neck gaiter) is more practical than a traditional scarf as it cannot blow away.
• Waterproof boots or insulated shoes: Snow is common in December through February. Slip-on sneakers will be miserable within an hour in snowy conditions.

Spring (March–May): The Most Comfortable Season

Spring is arguably Korea's most beautiful season. Cherry blossom season typically runs from late March to mid-April in Seoul. Temperatures range from 10°C to 22°C (50–72°F), making light layers ideal.

• A light jacket or windbreaker is sufficient for most of spring.
• April evenings can still drop to 7–10°C, so pack one mid-weight layer.
• Rain is possible — a compact travel umbrella is useful.
• Comfortable walking shoes are critical — spring in Korea means long days of outdoor exploration.

Summer (June–August): Hot, Humid, and Monsoon Season

Korean summers are hot and intensely humid, with a monsoon rainy season (장마, jangma) typically running from late June through mid-July. Temperatures reach 30–35°C (86–95°F) with humidity making it feel like 38–40°C.

• Light, breathable fabrics only. Cotton and linen are better than synthetics in Korean summer heat.
• Forget the heavy umbrella. A full-size umbrella in summer heat becomes a burden. Buy a cheap transparent convenience store umbrella (₩2,000–₩3,000, about $2) as soon as you need one — they are sold at every CU, GS25, and street vendor during rain season.
• Sun protection: Korean summer UV index is extreme. A UV-blocking arm cover (팔토시) is widely used and works better than sunscreen reapplication during long outdoor days.
• Indoor AC is aggressive. Korean buildings are often very heavily air-conditioned. Bring a light cardigan for restaurants and subway cars.

Autumn (September–November): Second Best Season

Autumn is Korea's second peak tourist season. Foliage turns in October and November, with Naejangsan and Seoraksan mountains offering world-class autumn leaf viewing.

• Layering is key: warm days (up to 22°C) and cool evenings (down to 5°C in November).
• A medium-weight jacket works for most of September and October.
• By November, temperatures resemble early winter — bring a puffer jacket if visiting late in the month.

What to Buy in Korea (Instead of Packing)

Korea has excellent clothing retail at very competitive prices. Rather than overpacking for any season, consider buying:

• Uniqlo Heat-Tech (cheaper than home markets, full size range available)
• Long Padding coat if visiting in winter (widely available, often on sale)
• Rain umbrellas (just buy one when it rains — $2 is not worth packing space)
• UV arm covers in summer (sold everywhere, very practical)