5-day weather forecast Seoul Sep 17, 2026

28°18° · Overcast

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.

Sunrise 06:15
Sunset 18:37
First Quarter42% illuminated
Moonrise 12:48 · Moonset 21:59
Chart
Table

Forecast from 18 °C to 28 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)212120201919191819212325262728282727262524242322
Precipitation (mm/hr)000000000000000000000000

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)665100100100991001001001001001008212841001001009710087100100100
Rain chance (%)62121314141516151311107179999108101112

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)1.311.191.51.51.51.311.611.691.61222.192.533.313.192.391.110.690.390.310.390.810.81
Wind gust (m/s)1.311.421.611.721.721.642.612.812.223.222.922.923.563.723.613.923.4220.720.720.830.831.421
Wind direction (°)ESE 115°ESE 103°ENE 76°E 83°E 80°ENE 78°E 86°E 87°E 86°E 86°E 83°E 86°E 91°E 95°ESE 105°E 100°ESE 104°E 91°SSE 156°SE 137°N 4°S 172°SSE 162°ESE 105°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)455053555860636562554536302726273032363840444952

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)764764764764764765765766766766766766765765765764764764764764765766766766

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index00000000.10.71.83.55.26.36.35.33.720.80.200000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)18.41818.319.320.321.822.123.124.324.116.414.613.913.913.412.511.611.51211.510.710.811.914.1
PM10 (µg/m³)21.521.521.92323.523.423.724.225.125.619.819.21919.118.417.215.915.415.514.81414.215.417.6
Ozone (O₃) (µg/m³)2826232019181713814397510412113113211895766863584735
NO₂ (µg/m³)6153.449.946.641.837.133.833.434.432.926.217.110.16.54.96.613.924.431.53127.126.132.642.1
SO₂ (µg/m³)12.711.511.210.9109.18.910.212.313.211.99.67.66.45.65.35.76.67.47.77.888.79.6
CO (µg/m³)376333298269241219215249301324287222172155154161179204222224217211210209

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.