Climate averages 1991–2020
Jeju City weather
in August.
A hot, wet month: the warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Jeju City: daytime highs average 28.7°C and nights cool to about 25.7°C. By daytime temperature it is the warmest month of the year.
Expect about 168 mm of rain on roughly 14 days, which makes August a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 24 min on an average August day.
The nearest other city in this atlas is Seogwipo (29 km away). In August its highs average 29.5°C, 0.8°C warmer than Jeju City, with 225 mm of rain.
Among the 79 cities listed in South Korea, Jeju City ranks joint 40th of 79 for the warmest August highs and 1st of 79 for the driest August (rainfall, lowest first). The mean August high of those 79 cities is 28.6°C; Jeju City is 0.2°C warmer than that mean.
From August to September, average highs fall by 3.4°C to 25.3°C, and monthly rainfall falls from 168 mm to 165 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Jeju City climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.0°C4.7°C | 4.7°C | 73 | 11.7 | 10.210 h |
| February | 9.1°C5.0°C | 5.0°C | 65 | 9.4 | 11.011 h |
| March | 12.2°C7.5°C | 7.5°C | 94 | 10.3 | 12.012 h |
| April | 16.4°C11.4°C | 11.4°C | 102 | 8.9 | 13.013 h |
| May | 20.1°C15.5°C | 15.5°C | 109 | 8.8 | 13.914 h |
| June | 23.5°C19.7°C | 19.7°C | 189 | 11.5 | 14.314 h |
| July | 27.6°C24.3°C | 24.3°C | 184 | 12.1 | 14.114 h |
| August, selected | 28.7°C25.7°C | 25.7°C | 168 | 13.7 | 13.413 h |
| September | 25.3°C22.3°C | 22.3°C | 165 | 11.1 | 12.412 h |
| October | 20.7°C17.4°C | 17.4°C | 79 | 6.7 | 11.411 h |
| November | 15.8°C11.9°C | 11.9°C | 70 | 8.8 | 10.510 h |
| December | 10.5°C6.8°C | 6.8°C | 68 | 11.0 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Seogwipo in AugustSouth Korea · 29 kmHigh 29.5°C · Low 25.3°C · 225 mm rain
- Mokpo in AugustSouth Korea · 145 kmHigh 27.8°C · Low 23.2°C · 204 mm rain
- Muan in AugustSouth Korea · 165 kmHigh 29.0°C · Low 23.0°C · 206 mm rain
- Yeosu in AugustSouth Korea · 174 kmHigh 27.5°C · Low 23.9°C · 224 mm rain
- Masan in AugustSouth Korea · 182 kmHigh 29.4°C · Low 22.6°C · 224 mm rain
- Suncheon in AugustSouth Korea · 183 kmHigh 29.3°C · Low 23.3°C · 288 mm rain
- Gwangju in AugustSouth Korea · 186 kmHigh 29.3°C · Low 22.4°C · 225 mm rain
- Kwangyang in AugustSouth Korea · 190 kmHigh 29.0°C · Low 23.4°C · 288 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Jeju City) is explained once on the Jeju City year overview and on the Sources, method and limits page.