Monthly weather overview

iconSeoul monthly weather overview South Korea · 서울

A quick, year-round overview of monthly and seasonal weather in Seoul. Use this page to get a feel for which months and seasons match your travel style.

Seoul weather at a glance

  • Seoul has strong seasonal contrast: winter cold snaps and summer heat/humidity often sit at opposite ends of comfort. Wind, humidity, and the urban heat island can change how the same temperature feels.
  • June–July monsoon season and mid-summer downpours can bring heavy rain bursts that reshape walking-heavy plans.
  • In spring and winter, fine dust can be a real variable—temperatures may look pleasant, while the air changes the outdoor feel.
  • Typical itineraries (Han River, Bukchon/Seochon, Namsan, Hongdae/Seongsu) are walk-heavy, so shoes and layering matter.
  • Indoor heating/AC is strong, creating “hot outside / cold inside” contrast on some days.
Jan · Feb

Dry winter cold with wind-driven chill

Avg low -7 to -3°C / high 2–6°C · Snow/rain days: 3–6 per month / 15–35 mm

  • Cold snaps can drop comfort quickly, and wind increases chill.
  • Dry air can affect skin and throat comfort.
  • Even with little snowfall, early-morning ice can make sidewalks slick.

Suggested outfits

  • · Puffer/thick coat
  • · Warm inner layers
  • · Gloves/scarf/hat

A note for travelers

Winter comfort depends on wind and outdoor time—not only the temperature.

Mar · Apr

Spring transition: mild days, cooler evenings

Avg low 2–10°C / high 12–19°C · Rainy days: 5–9 per month / 40–100 mm

  • Day-to-night swings are common—layering helps.
  • Breezy evenings can feel cooler than expected.
  • Fine dust days can change outdoor comfort even when temperatures look nice.

Suggested outfits

  • · Trench/light coat
  • · Shirts/sweatshirts/light knits
  • · Comfortable walking shoes

A note for travelers

In spring, one flexible layer often solves most comfort swings.

May · Jun

Pleasant May; June turns humid with monsoon rain

Avg low 12–20°C / high 22–28°C · Rainy days: 7–12 per month / 80–180 mm (can rise in monsoon)

  • May is often comfortable; June becomes more humid and rainy.
  • Monsoon stretches can slow travel pace.
  • Strong indoor AC can create “humid outside, cool inside” contrast.

Suggested outfits

  • · Breathable tops
  • · Light cardigan/wind layer
  • · Umbrella + water-friendly footwear

A note for travelers

In June, plan for wetness and footing—not just rain probability.

Jul · Aug

Hot, humid summer with downpours and warm nights

Avg low 22–25°C / high 29–33°C · Rainy days: 8–13 per month / 200–350 mm (high variability)

  • Humidity and urban heat can keep nights warm.
  • Heavy rain bursts can interrupt routes.
  • Strong indoor AC makes a thin layer useful.

Suggested outfits

  • · Light summer clothing
  • · Hat/sunscreen/small towel
  • · Thin indoor layer

A note for travelers

In summer, timing matters: shorten midday outdoors and use indoor breaks.

Sep · Oct

Crisper air returns; September can still be unsettled

Avg low 10–19°C / high 19–27°C · Rainy days: 4–8 per month / 40–120 mm

  • September can mix lingering warmth with cooler evenings.
  • October is often one of the easiest months for walking itineraries.
  • Rain and breeze can shift comfort quickly.

Suggested outfits

  • · T-shirt + light outer (Sep)
  • · Long sleeves/light knits (Oct)
  • · Comfortable sneakers

A note for travelers

Autumn is comfortable enough to over-walk—shoes matter.

Nov · Dec

Cooling quickly after sunset, with drier air

Avg low -3–5°C / high 7–13°C · Snow/rain days: 3–6 per month / 20–50 mm

  • Afternoons can look mild; evenings cool fast.
  • Dry air can affect comfort for some travelers.
  • Wind can make the same temperature feel sharper.

Suggested outfits

  • · Coat/puffer
  • · Warm inner layers
  • · Scarf

A note for travelers

If you’ll be out after sunset, assume one extra layer.

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Explore Seoul

These pages are connected so you can compare conditions and decide for yourself.

Seoul monthly weather overview — seasons & best time to visit | CityWeather | CityWeather