The numbers, city by city
These figures are long-term averages from the Korea Meteorological Administration’s 1991–2020 climate normals. They help with seasonal planning but are not forecasts or temperature limits.
August averages: daily maximum, daily minimum and monthly rainfall
| City | Average daily high / low (°C) | Average monthly precipitation (mm) |
|---|---|---|
| Seoul | 30.0 / 22.9 | 348 |
| Busan | 29.5 / 23.7 | 267 |
| Incheon | 29.2 / 22.9 | 275 |
| Jeju | 30.1 / 24.8 | 272 |
| Gangneung | 28.6 / 21.9 | 293 |
| Gyeongju | 31.4 / 21.9 | 192 |
| Sokcho | 27.5 / 21.2 | 298 |
| Daegu | 31.3 / 23.1 | This dataset does not provide the value. |
January averages: daily maximum and daily minimum
| City | Average daily high / low (°C) |
|---|---|
| Seoul | 2.1 / −5.5 |
| Busan | 8.2 / −0.1 |
| Incheon | 2.2 / −4.8 |
| Jeju | 8.6 / 3.7 |
| Gangneung | 5.3 / −2.7 |
| Gyeongju | 5.9 / −4.7 |
| Sokcho | 4.2 / −3.8 |
| Daegu | 5.9 / −2.9 |
Jeju’s coastal winter averages are milder than Seoul’s, but Jeju can still experience freezing weather, strong wind and snow, especially at higher elevations. The difference between two monthly averages is not the full range of temperatures a city can experience. A dash in the table means a figure is not shown here, not that no rainfall was recorded.
Use the current forecast
Check the temperature, wind, humidity and precipitation for the place and time you will be outside. 체감온도 means feels-like temperature. It helps describe the effect of conditions such as humidity or wind, but it is not the only criterion used for weather alerts.
Follow current Korea Meteorological Administration alerts and local instructions. Mountain weather can differ substantially from conditions in the nearest city.
Take practical breaks from heat or cold
In hot weather, reduce strenuous activity during the hottest hours, drink water and take breaks in cooler places. In cold weather, wear appropriate layers, gloves and a hat, and keep clothing dry. Watch for slippery paths and allow extra time for walking.
Public heat shelters (무더위쉼터) and cold shelters (한파쉼터) may provide places to cool down or warm up. Use local-government information or the government safety app to find a location and confirm its opening hours and access arrangements. Do not assume every community building is open whenever an alert is issued.
Pack for changes during the day
For spring and autumn, bring layers you can add after sunset or remove in a warmer afternoon. For summer, choose breathable clothing and sun protection. For winter, choose insulation and footwear suited to the forecast and planned activity.
If someone becomes seriously unwell in heat or cold, call 119. Do not treat confusion, collapse or severe symptoms as a reason merely to change clothes and continue sightseeing.
