5-day weather forecast Seoul Sep 12, 2026
26°Weather forecast Seoul today Sep 12, 2026: overcast, temperature from 18 °C to 26 °C.
Precipitation probability 17%. Wind up to 1.19 m/s (gusts 1.61 m/s). Air humidity 34–68%, atmospheric pressure 765–767 mm Hg, UV index up to 6.2.
5 days at a glance — tap a day to open it
Sunrise 06:11
Sunset 18:45
Sunset 18:45
New Moon3% illuminated
Moonrise 07:00 · Moonset 19:04
Moonrise 07:00 · Moonset 19:04
Chart
TableSat, Sep 12, 2026
Forecast from 18 °C to 26 °C and precipitation
Cloud cover and precipitation probability
Wind speed and direction
Air humidity
Atmospheric pressure
Ultraviolet index
Air quality & pollen
Sat, Sep 12, 2026
Frequently asked questions about the 5-day weather in Seoul
What will the weather be like in Seoul over the next 5 days?
Over the next 5 days in Seoul the temperature is expected to range from about 17 to 28 °C. See the detailed hourly forecast for each of the 5 days in the charts above.
On which of the next 5 days will it rain in Seoul?
The chance of rain in Seoul over the next 5 days reaches 18%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.
How accurate is the 5-day weather forecast for Seoul?
A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.
Which of the next 5 days in Seoul will be the warmest and which the coolest?
Over the next 5 days the temperature in Seoul ranges from about 17 to 28 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in Seoul over the next 5 days?
Over the next 5 days the wind in Seoul picks up to 5 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in Seoul is best for a walk or a trip?
For a walk or a trip, pick the days with the lowest chance of rain (up to 18%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for Seoul?
The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.
Will I need an umbrella or sunscreen in Seoul this week?
Rain reaches a 18% chance across the next 5 days, so pack something waterproof for the wettest of them — the daily strip above shows which. Today’s UV index peaks at 6.2; sunscreen is worth it from about 3 upwards.
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.