5-day weather forecast Seoul Sep 17, 2026
28°Weather forecast Seoul tomorrow Sep 17, 2026: overcast, temperature from 18 °C to 28 °C.
Precipitation probability 16%. Wind up to 3.31 m/s (gusts 3.92 m/s). Air humidity 26–65%, atmospheric pressure 764–766 mm Hg, UV index up to 6.3.
5 days at a glance — tap a day to open it
Sunrise 06:15
Sunset 18:37
Sunset 18:37
First Quarter42% illuminated
Moonrise 12:48 · Moonset 21:59
Moonrise 12:48 · Moonset 21:59
Chart
Table
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Cloudy | 21 °C | 6% | 66% | 45% | 764 mm Hg | ESE 115° 1.31 (1.31) m/s | 0 |
| 01:00 |  Clear | 21 °C | 2% | 5% | 50% | 764 mm Hg | ESE 103° 1.19 (1.42) m/s | 0 |
| 02:00 |  Overcast | 20 °C | 12% | 100% | 53% | 764 mm Hg | ENE 76° 1.5 (1.61) m/s | 0 |
| 03:00 | Overcast | 20 °C | 13% | 100% | 55% | 764 mm Hg | E 83° 1.5 (1.72) m/s | 0 |
| 04:00 | Overcast | 19 °C | 14% | 100% | 58% | 764 mm Hg | E 80° 1.5 (1.72) m/s | 0 |
| 05:00 | Overcast | 19 °C | 14% | 99% | 60% | 765 mm Hg | ENE 78° 1.31 (1.64) m/s | 0 |
| 06:00 | Overcast | 19 °C | 15% | 100% | 63% | 765 mm Hg | E 86° 1.61 (2.61) m/s | 0 |
| 07:00 | Overcast | 18 °C | 16% | 100% | 65% | 766 mm Hg | E 87° 1.69 (2.81) m/s | 0.1 |
| 08:00 | Overcast | 19 °C | 15% | 100% | 62% | 766 mm Hg | E 86° 1.61 (2.22) m/s | 0.7 |
| 09:00 | Overcast | 21 °C | 13% | 100% | 55% | 766 mm Hg | E 86° 2 (3.22) m/s | 1.8 |
| 10:00 | Overcast | 23 °C | 11% | 100% | 45% | 766 mm Hg | E 83° 2 (2.92) m/s | 3.5 |
| 11:00 | Overcast | 25 °C | 10% | 100% | 36% | 766 mm Hg | E 86° 2.19 (2.92) m/s | 5.2 |
| 12:00 |  Cloudy | 26 °C | 7% | 82% | 30% | 765 mm Hg | E 91° 2.5 (3.56) m/s | 6.3 |
| 13:00 |  Sunny | 27 °C | 1% | 12% | 27% | 765 mm Hg | E 95° 3 (3.72) m/s | 6.3 |
| 14:00 | Cloudy | 28 °C | 7% | 84% | 26% | 765 mm Hg | ESE 105° 3.31 (3.61) m/s | 5.3 |
| 15:00 | Overcast | 28 °C | 9% | 100% | 27% | 764 mm Hg | E 100° 3.19 (3.92) m/s | 3.7 |
| 16:00 | Overcast | 27 °C | 9% | 100% | 30% | 764 mm Hg | ESE 104° 2.39 (3.42) m/s | 2 |
| 17:00 | Overcast | 27 °C | 9% | 100% | 32% | 764 mm Hg | E 91° 1.11 (2) m/s | 0.8 |
| 18:00 | Overcast | 26 °C | 9% | 97% | 36% | 764 mm Hg | SSE 156° 0.69 (0.72) m/s | 0.2 |
| 19:00 | Overcast | 25 °C | 10% | 100% | 38% | 764 mm Hg | SE 137° 0.39 (0.72) m/s | 0 |
| 20:00 | Cloudy | 24 °C | 8% | 87% | 40% | 765 mm Hg | N 4° 0.31 (0.83) m/s | 0 |
| 21:00 | Overcast | 24 °C | 10% | 100% | 44% | 766 mm Hg | S 172° 0.39 (0.83) m/s | 0 |
| 22:00 | Overcast | 23 °C | 11% | 100% | 49% | 766 mm Hg | SSE 162° 0.81 (1.42) m/s | 0 |
| 23:00 | Overcast | 22 °C | 12% | 100% | 52% | 766 mm Hg | ESE 105° 0.81 (1) m/s | 0 |
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Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.