Climate averages 1991–2020
Seogwipo weather
in September.
A warm, very wet month: the 3rd warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Seogwipo: daytime highs average 26.0°C and nights cool to about 21.8°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 183 mm of rain on roughly 12 days, which makes September a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 24 min on an average September day.
The nearest other city in this atlas is Jeju City (29 km away). In September its highs average 25.3°C, 0.7°C cooler than Seogwipo, with 165 mm of rain.
Among the 79 cities listed in South Korea, Seogwipo ranks 1st of 79 for the warmest September highs and 76th of 79 for the driest September (rainfall, lowest first). The mean September high of those 79 cities is 24.8°C; Seogwipo is 1.3°C warmer than that mean.
From September to October, average highs fall by 4.7°C to 21.3°C, and monthly rainfall falls from 183 mm to 86 mm.
The annual picture
September 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
Seogwipo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.1°C4.1°C | 4.1°C | 56 | 8.3 | 10.210 h |
| February | 9.4°C4.3°C | 4.3°C | 60 | 8.0 | 11.011 h |
| March | 13.0°C6.8°C | 6.8°C | 99 | 9.8 | 12.012 h |
| April | 17.7°C10.9°C | 10.9°C | 121 | 9.0 | 13.013 h |
| May | 22.0°C15.3°C | 15.3°C | 132 | 9.3 | 13.914 h |
| June | 25.1°C19.6°C | 19.6°C | 229 | 13.0 | 14.314 h |
| July | 28.7°C24.3°C | 24.3°C | 227 | 15.9 | 14.114 h |
| August | 29.5°C25.3°C | 25.3°C | 225 | 17.1 | 13.413 h |
| September, selected | 26.0°C21.8°C | 21.8°C | 183 | 12.4 | 12.412 h |
| October | 21.3°C16.7°C | 16.7°C | 86 | 6.5 | 11.411 h |
| November | 16.0°C11.3°C | 11.3°C | 65 | 7.8 | 10.510 h |
| December | 10.5°C6.2°C | 6.2°C | 55 | 8.1 | 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
September in nearby cities
- Jeju City in SeptemberSouth Korea · 29 kmHigh 25.3°C · Low 22.3°C · 165 mm rain
- Mokpo in SeptemberSouth Korea · 174 kmHigh 24.5°C · Low 19.0°C · 149 mm rain
- Muan in SeptemberSouth Korea · 193 kmHigh 25.4°C · Low 18.4°C · 147 mm rain
- Yeosu in SeptemberSouth Korea · 196 kmHigh 24.5°C · Low 20.1°C · 160 mm rain
- Suncheon in SeptemberSouth Korea · 207 kmHigh 25.9°C · Low 18.4°C · 160 mm rain
- Masan in SeptemberSouth Korea · 210 kmHigh 25.8°C · Low 17.5°C · 145 mm rain
- Kwangyang in SeptemberSouth Korea · 214 kmHigh 25.7°C · Low 18.8°C · 160 mm rain
- Gwangju in SeptemberSouth Korea · 214 kmHigh 25.7°C · Low 17.2°C · 138 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 Seogwipo) is explained once on the Seogwipo year overview and on the Sources, method and limits page.