SeasonMapGangneung weather in September
South Korea
September in Gangneung: nice, soaked, with clean air — fine if you can take 15 rainy days.
#6 of 12 months in Gangneung · #927 of 1383 destinations to visit in September · comfort 71/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Gangneung in September
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Gangneung climate normals — September
| Daytime high | 23°C / 73°F | 😎 nice |
|---|---|---|
| Nighttime low | 18°C / 65°F | |
| Sea temperature | 24°C / 76°F | 🙂 pleasant |
| Rainfall | 228 mm / 9 in | ⛈ soaked |
| Rainy days | 15 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 17°C / 63°F | |
| Sunshine | 7.9 h/day | |
| Daylight | 12.4 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Gangneung in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyChuseok in South Korea, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Gangneung's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherGangneung's weather peaks April–June.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Gangneung — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Gangneung?
Gangneung in September — FAQ
- Is September a good time to visit Gangneung?
- September in Gangneung: nice, soaked, with clean air — fine if you can take 15 rainy days. It ranks #6 of 12 months for Gangneung on SeasonMap's comfort score (71/100).
- What is the weather like in Gangneung in September?
- In September, Gangneung averages a daily high of 22.8°C and a low of 18.2°C, with about 227.5 mm of rain over roughly 14.6 rainy days.
- What is the air quality in Gangneung in September?
- Gangneung has a mean US Air Quality Index of about 43 in September.
Other months in Gangneung
Compare Gangneung in September
Warmer or cooler than Gangneung in September
Similar destinations in East Asia — September
Within 300 km: Seoul's Chuseok on 24–26 Sep, and Busan's Chuseok on 24–26 Sep.