Tomorrow's Weather Forecast - Seoul

Tomorrow's weather in Seoul. high 27°C (81°F), low 17°C (63°F). Mainly Clear.

Tomorrow’s Outlook

Tomorrow will be 2°C warmer than today. Expect pleasant, mostly clear skies with little chance of rain. Humidity sits at a moderate 68%, so the air shouldn't feel unusually damp or dry. Winds stay light and calm, rarely topping 4 km/h. Sunrise is at 6:11 AM and sunset at 6:45 PM, for about 12h 34m of daylight.

Tomorrow
27°/ 17°
Today25° / 14°

Tomorrow’s Hourly Weather Outlook

Morning6 AM – Noon20°
Rain probability
0%
Wind speed
3 km/h
AfternoonNoon – 6 PM26°
Rain probability
0%
Wind speed
3 km/h
Evening6 PM – Midn23°
Rain probability
0%
Wind speed
3 km/h
NightMidn – 6 AM19°
Rain probability
0%
Wind speed
4 km/h

24-Hour Rain & Temperature Forecast

Tomorrow12 Sep
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Temperature · peaks at +27°C

Planning Advice for Tomorrow

Clothing
Light layers work well; a jacket for the evening.
Outdoor
Good conditions for outdoor activities.
Travel
Standard travel conditions expected.

Sunrise & Sunset

Sunrise
Dawn 5:41 AM
Total Daylight
Full day forecastSolar noon 12:28 PM
Sunset
Dusk 7:15 PM
vs today-2 min daylight
Sunrise shift1 min later
Sunset shift1 min earlier

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Seoul is forecast to reach a high of 27°C tomorrow, with an overnight low around 17°C. That's 2° above the long-term average high of 25°C for this time of year. It continues a recent pattern — 16 of the last 19 days with published data have run warmer than normal. Expect little chance of rain (0% probability) and light winds averaging 4 km/h. Air quality is currently Moderate (AQI 83), driven mainly by PM2.5 at 29 μg/m³.

Today vs Normal

25°C0° below normal

The long-term average high for today is 25°C.

16 of the last 19 days with published data ran above normal.

That's a break from the pattern - today's forecast runs below normal even though the recent stretch mostly ran above.

2026-08-19: 29°C29°2026-08-20: 26°C26°2026-08-21: 25°C25°2026-08-22: 29°C29°2026-08-23: 32°C32°2026-08-24: 31°C31°2026-08-25: 31°C31°2026-08-26: 31°C31°2026-08-27: 31°C31°2026-08-28: 29°C29°2026-08-29: 29°C29°2026-08-30: 27°C27°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.