5-day weather forecast Seoul Sep 18, 2026
29°Weather forecast Seoul Friday Sep 18, 2026: sunny, temperature from 18 °C to 29 °C.
Precipitation probability 15%. Wind up to 4.19 m/s (gusts 8.33 m/s). Air humidity 30–63%, atmospheric pressure 765–767 mm Hg, UV index up to 7.
5 days at a glance — tap a day to open it
Sunrise 06:16
Sunset 18:35
Sunset 18:35
First Quarter53% illuminated
Moonrise 13:46 · Moonset 22:51
Moonrise 13:46 · Moonset 22:51
Chart
Table
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 21 °C | 12% | 95% | 53% | 766 mm Hg | ENE 69° 1.19 (1.39) m/s | 0 |
| 01:00 | Overcast | 21 °C | 13% | 100% | 54% | 766 mm Hg | ENE 63° 1.61 (2.39) m/s | 0 |
| 02:00 | Overcast | 20 °C | 11% | 89% | 56% | 766 mm Hg | ENE 71° 1.31 (2) m/s | 0 |
| 03:00 |  Cloudy | 20 °C | 10% | 77% | 57% | 766 mm Hg | ENE 74° 1.61 (2.42) m/s | 0 |
| 04:00 | Cloudy | 19 °C | 9% | 66% | 59% | 766 mm Hg | ENE 75° 1.69 (3) m/s | 0 |
| 05:00 | Overcast | 18 °C | 15% | 99% | 61% | 766 mm Hg | E 80° 1.61 (2.72) m/s | 0 |
| 06:00 | Overcast | 18 °C | 15% | 99% | 63% | 767 mm Hg | E 79° 1.61 (2.92) m/s | 0 |
| 07:00 |  Cloudy | 18 °C | 10% | 65% | 63% | 767 mm Hg | ENE 77° 1.61 (2.53) m/s | 4 |
| 08:00 | Sunny | 19 °C | 4% | 6% | 60% | 767 mm Hg | ENE 72° 2 (3.39) m/s | 5 |
| 09:00 | Sunny | 21 °C | 3% | 5% | 55% | 767 mm Hg | ENE 77° 2.61 (5.39) m/s | 6 |
| 10:00 | Sunny | 23 °C | 2% | 0% | 48% | 767 mm Hg | E 86° 3.11 (5) m/s | 6 |
| 11:00 | Sunny | 25 °C | 1% | 0% | 42% | 767 mm Hg | E 85° 3.81 (5.5) m/s | 6 |
| 12:00 | Sunny | 26 °C | 1% | 0% | 38% | 767 mm Hg | E 84° 3.81 (6.22) m/s | 7 |
| 13:00 | Sunny | 27 °C | 1% | 0% | 35% | 766 mm Hg | ESE 102° 3.31 (6) m/s | 7 |
| 14:00 | Sunny | 29 °C | 1% | 0% | 32% | 765 mm Hg | ESE 116° 3.61 (5.72) m/s | 7 |
| 15:00 | Sunny | 29 °C | 0% | 0% | 31% | 765 mm Hg | ESE 115° 3.5 (5) m/s | 7 |
| 16:00 | Sunny | 29 °C | 0% | 0% | 30% | 765 mm Hg | ESE 113° 3.31 (4.5) m/s | 7 |
| 17:00 | Sunny | 28 °C | 1% | 0% | 31% | 765 mm Hg | ESE 103° 3.89 (4.31) m/s | 7 |
| 18:00 | Sunny | 27 °C | 1% | 2% | 38% | 765 mm Hg | E 101° 4.11 (6.03) m/s | 7 |
| 19:00 |  Clear | 25 °C | 1% | 6% | 43% | 766 mm Hg | E 88° 4.19 (7.61) m/s | 0 |
| 20:00 |  Partly cloudy | 23 °C | 3% | 37% | 47% | 767 mm Hg | E 79° 3.5 (8.11) m/s | 0 |
| 21:00 | Clear | 23 °C | 2% | 9% | 50% | 767 mm Hg | E 82° 3.39 (8.33) m/s | 0 |
| 22:00 | Partly cloudy | 22 °C | 7% | 62% | 53% | 767 mm Hg | ENE 78° 3 (7.5) m/s | 0 |
| 23:00 | Overcast | 21 °C | 13% | 98% | 56% | 767 mm Hg | ENE 78° 2.61 (8.19) m/s | 0 |
Seoul on the map
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.