Jeju City weather › August
August is the rainiest month of the year and the hottest in Jeju City. On average it rains on 10 of 31 days, with highs of 31°C (87°F) and lows of 25°C (77°F).
Trip rating: Good (64/100) · Best months: May–June and October
Rainy day = 1 mm or more of rain. Of these, about 5 days get 10 mm or more. Average of the last 30 years.
Light summer clothes: T-shirts, shorts and breathable fabrics. Nights stay warm, but air conditioning indoors can be strong.
Rain is similar to July. Daytime highs fall to 27°C (80°F) in September.
Pick your arrival and departure dates. We look up the same dates over the last 30 years.
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| Time zone | Korea Standard Time (UTC+9), no daylight saving |
|---|---|
| Power | 220V, 60Hz, Type C/F (round two-pin) sockets |
| Money | Korean won (KRW). Cards are accepted almost everywhere |
| Entry | Visa and K-ETA rules change — check the official K-ETA site and your government's travel advice |
Sunrise 5:56, sunset 19:21 on August 15 (local time) — about 13 h 25 min of daylight.
Observed at Korea Meteorological Administration (KMA) station 184, 1996–2025 daily records. Sea temperature: ERA5 (Copernicus), daily mean just offshore. How we calculate