Today, 2026-09-23: Mostly clear, 26°C / 17°C, rain chance 35%. Fine dust PM2.5 23 µg/m³ (Moderate), PM10 25 µg/m³. What to wear: warm — short sleeves; a light layer for evenings.
7-day forecast
| Day | Sky | High / Low | Rain chance | Wind |
|---|---|---|---|---|
| Wed 09/23 | Mostly clear | 26° / 17° | 35% | 6 km/h |
| Thu 09/24 | Overcast | 26° / 17° | 0% | 6 km/h |
| Fri 09/25 | Overcast | 25° / 18° | 69% | 6 km/h |
| Sat 09/26 | Light drizzle | 26° / 18° | 27% | 7 km/h |
| Sun 09/27 | Light drizzle | 27° / 18° | 4% | 6 km/h |
| Mon 09/28 | Light drizzle | 26° / 19° | 14% | 13 km/h |
| Tue 09/29 | Overcast | 24° / 17° | 15% | 16 km/h |
Seasons, festivals and what’s on
- Music Bank Global Festival 2026 Japan lineup: 8 acts and December dates at Tokyo National Stadium
- Bungeoppang Korean Street Food: Cost, Where to Buy (2026)
- Gyeongbokgung Night Viewing 2026 Tickets: 3,000 KRW, Foreigner On-Site Buy
- Andong Maskdance Festival 2026: dates, tickets, travel
- Made in Korea Season 2 cast: Woo Do-hwan, new faces, Sep 9
- BTS iHeart Radio Music Festival 2026 where to watch replay setlist
- Seoraksan fall foliage 2026 dates: first color Sept 27–30
- Made in Korea Season 2 where to watch: Disney+ vs Hulu
FAQ
What is the weather in Seoul today?
2026-09-23: Mostly clear, high 26°C, low 17°C, chance of rain 35%. Fine dust (PM2.5) is around 23 µg/m³ — Moderate on the Korean scale.
What should I wear in Seoul this week?
Highs run 24–27°C: warm — short sleeves; a light layer for evenings. Pack a compact umbrella — rain is likely on Fri.
Will it rain in Seoul this week?
Rain is likely (50% or higher) on Fri 09/25.
How accurate is this forecast?
It is the Open-Meteo model forecast for central Seoul (37.57°N, 126.98°E), refreshed every morning Korea time. Beyond three days, treat it as a trend rather than a promise; check again the day before you travel.
Source: Open-Meteo forecast and air-quality models for central Seoul · updated 2026-09-23