SeasonScore
Seoul, South Korea
Photo: Malink_78 · CC BY 2.0

South Korea

Seoul in May

🌷 Spring

Pleasant and some showers.

🎒 Pack: compact umbrella or rain jacket

Best months: Oct (8.9), May (8.8), Apr (8.5)

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Why May scores 8.8What goes into the score

How it works
🌡️ 24° / 14°C🌧️ 104 mm💧 dew pt 11°🍃 PM2.5 29
  • Weather comfort9.2
    • ✓Comfortable temperatures (24°C highs / 14°C lows)
    • ✓Comfortable humidity (dew point 10.9°C)
    • !Wet: ~104 mm rain, ~4 heavy-rain days
  • Air quality6.4
    • !Elevated (PM2.5 ~29 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline9.0
    • ·Normal precautions
Compare monthsPut May side by side with another month
MayOct
Score8.8 Excellent8.9 Excellent
Season🌷 Spring🍂 Autumn
High / low24° / 14°20° / 11°
Rain104 mm52 mm
Humiditydew pt 11°dew pt 10°
PM2.529 µg/m³19 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Seoul weather-station normals. Rainfall: Seoul weather-station normals (national met service).

Holidays & crowdsMay 2027

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • Labor Day 1–3 May · 3 days off in a row

Other public holidays: Children's Day (5 May) · Buddha's Birthday (13 May)

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Nature calendarBlossoms, leaves & seasons in Seoul

  • 2026 forecast: autumn leaves (central Korea)2026 forecast
    Peak ~31 Oct–5 Nov 2026

    Forecast for the central region; first colour 10–27 Oct.

    Source: Weather i 2026 autumn foliage forecast (4 Sep 2026)

  • Cherry blossomTypical dates
    First blooms ~8 Apr, full bloom ~10 Apr

    Typical dates at the KMA Seoul observatory tree (normal). In 2026 the first blooms came on 29 Mar; Yeouido's Yunjung-ro usually flowers ~6 Apr. Recent years have been earlier than the normal.

    Source: Korea Meteorological Administration, 29 Mar 2026

  • Snowy daysTypical dates
    Snow likely Nov–Mar (most in Jan: ~7 days)

    Average number of days with snowfall at Seoul.

    Source: Seoul weather-station normals (national weather service, via Wikipedia climate table)

Explore SeoulEvents, sights, food & souvenirs

Check event dates locally

South Korea's capital, mixing Joseon-era palaces and hanok neighbourhoods with K-pop, street food markets and late-night shopping districts.

Events in May
Lotus Lantern FestivalDate variesLunar calendar — the weeks before Buddha's Birthday, usually April or May

A large evening lantern parade and street events.

Why go: Free to watch; the parade route gets crowded.

Where: Jogyesa Temple and Jongno

Coming up later

ChuseokDate variesLunar calendar — usually September or early October

The harvest festival, when families gather for ancestral rites.

Why go: Many shops close and transport out of Seoul is busy; palaces may hold events.

Where: Nationwide

Seoul International Fireworks FestivalDate variesUsually late September or early October

A large fireworks display over the Han River.

Why go: Very crowded; arrive early.

Where: Yeouido Hangang Park

Cherry blossom seasonDate variesUsually early April

Cherry trees bloom across the city for about a week.

Why go: Popular spots are crowded on weekends.

Where: Yeouido, Seokchon Lake and parks