5-day weather forecast Seoul 18-05-2026
Weather forecast Seoul today 18.05.2026: sunny, temperature from 18 °C to 29 °C.
No precipitation expected. Wind up to 4.81 m/s (gusts 5.53 m/s). Air humidity 18–43%, atmospheric pressure 761–764 mm Hg, UV index up to 8.9.
Sunset 19:37
Moonrise 05:56 · Moonset 21:46
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 20 °C | 0% | 7% | 38% | 764 mm Hg | W 279° 0.89 (1.64) m/s | 0 |
| 01:00 | Clear | 20 °C | 0% | 3% | 39% | 764 mm Hg | SW 233° 0.19 (0.39) m/s | 0 |
| 02:00 | Clear | 19 °C | 0% | 2% | 40% | 763 mm Hg | SE 128° 1 (2) m/s | 0 |
| 03:00 | Clear | 19 °C | 0% | 0% | 41% | 762 mm Hg | ESE 104° 0.81 (1.61) m/s | 0 |
| 04:00 | Clear | 18 °C | 0% | 0% | 42% | 762 mm Hg | NNE 29° 0.31 (0.61) m/s | 0 |
| 05:00 | Clear | 18 °C | 0% | 0% | 43% | 763 mm Hg | NNE 23° 0.61 (1.25) m/s | 0 |
| 06:00 |  Sunny | 18 °C | 0% | 0% | 43% | 763 mm Hg | E 97° 0.89 (1.75) m/s | 0.1 |
| 07:00 | Sunny | 20 °C | 0% | 0% | 39% | 763 mm Hg | E 83° 0.61 (0.86) m/s | 0.6 |
| 08:00 | Sunny | 22 °C | 0% | 0% | 34% | 763 mm Hg | ESE 111° 0.61 (0.69) m/s | 1.8 |
| 09:00 | Sunny | 24 °C | 0% | 0% | 29% | 763 mm Hg | WSW 258° 0.81 (0.92) m/s | 3.7 |
| 10:00 | Sunny | 26 °C | 0% | 0% | 25% | 763 mm Hg | SW 233° 1.31 (1.5) m/s | 5.9 |
| 11:00 | Sunny | 27 °C | 0% | 0% | 37% | 763 mm Hg | SW 224° 2.19 (2.53) m/s | 8.1 |
| 12:00 | Sunny | 28 °C | 0% | 0% | 19% | 762 mm Hg | SW 234° 3.19 (3.67) m/s | 8.9 |
| 13:00 | Sunny | 29 °C | 0% | 0% | 18% | 762 mm Hg | WSW 245° 4.19 (4.83) m/s | 8.8 |
| 14:00 | Sunny | 29 °C | 0% | 0% | 18% | 761 mm Hg | WSW 248° 4.81 (5.53) m/s | 7.1 |
| 15:00 | Sunny | 28 °C | 0% | 0% | 20% | 761 mm Hg | WSW 251° 4.31 (4.94) m/s | 5.6 |
| 16:00 | Sunny | 27 °C | 0% | 0% | 22% | 761 mm Hg | WSW 256° 4.31 (4.94) m/s | 3.5 |
| 17:00 | Sunny | 27 °C | 0% | 2% | 23% | 761 mm Hg | WSW 255° 3.81 (4.36) m/s | 1.7 |
| 18:00 | Sunny | 26 °C | 0% | 0% | 25% | 761 mm Hg | W 260° 3.5 (4.03) m/s | 0.6 |
| 19:00 | Sunny | 24 °C | 0% | 20% | 28% | 761 mm Hg | W 271° 3.11 (3.97) m/s | 0.1 |
| 20:00 |  Overcast | 23 °C | 0% | 100% | 30% | 762 mm Hg | W 271° 1.61 (2.22) m/s | 0 |
| 21:00 | Clear | 23 °C | 0% | 8% | 31% | 762 mm Hg | WNW 295° 1.81 (2.47) m/s | 0 |
| 22:00 | Overcast | 22 °C | 0% | 94% | 34% | 763 mm Hg | WNW 282° 1.19 (1.83) m/s | 0 |
| 23:00 | Overcast | 22 °C | 0% | 100% | 35% | 763 mm Hg | W 277° 0.61 (0.86) m/s | 0 |
Frequently asked questions about the weather in Seoul
Today in Seoul the temperature ranges from 18 °C to 29 °C, wind up to 4.81 m/s. Check the detailed hourly forecast above for more information.
The precipitation probability in Seoul today is 0%. View the full multi-day forecast above to see the rain chances for each upcoming day.
The wind speed in Seoul today reaches up to 4.81 m/s with gusts up to 5.53 m/s. Check the detailed wind chart above for hourly wind data.
The air humidity in Seoul today ranges from 18% to 43%. View the humidity chart above for hourly details.
The UV index in Seoul today reaches up to 8.9. Check the UV index chart above for hourly values throughout the day.
The atmospheric pressure in Seoul today ranges from 761 to 764 mm Hg. View the pressure chart above for hourly readings.
Cloud cover in Seoul today reaches up to 100%. Check the cloud cover chart above for hourly details throughout the day.
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.