Climate averages 1991–2020
Suncheon weather
in September.
A warm, wet month: the 4th 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 Suncheon: daytime highs average 25.9°C and nights cool to about 18.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 160 mm of rain on roughly 10 days, which makes September a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Kwangyang (10 km away). In September its highs average 25.7°C, about as warm as Suncheon, with 160 mm of rain.
Among the 79 cities listed in South Korea, Suncheon ranks 2nd of 79 for the warmest September highs and joint 60th of 79 for the driest September (rainfall, lowest first). The mean September high of those 79 cities is 24.8°C; Suncheon is 1.1°C warmer than that mean.
From September to October, average highs fall by 5.0°C to 20.9°C, and monthly rainfall falls from 160 mm to 66 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
Suncheon climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.7°C-2.4°C | -2.4°C | 29 | 4.1 | 10.110 h |
| February | 8.1°C-1.3°C | -1.3°C | 43 | 4.9 | 10.911 h |
| March | 12.8°C2.5°C | 2.5°C | 79 | 7.5 | 11.912 h |
| April | 18.4°C8.0°C | 8.0°C | 120 | 8.4 | 13.013 h |
| May | 23.1°C13.5°C | 13.5°C | 138 | 8.2 | 14.014 h |
| June | 26.1°C18.3°C | 18.3°C | 194 | 10.7 | 14.514 h |
| July | 28.6°C22.6°C | 22.6°C | 321 | 17.8 | 14.314 h |
| August | 29.3°C23.3°C | 23.3°C | 288 | 17.1 | 13.513 h |
| September, selected | 25.9°C18.4°C | 18.4°C | 160 | 10.3 | 12.412 h |
| October | 20.9°C11.7°C | 11.7°C | 66 | 4.7 | 11.311 h |
| November | 14.2°C5.0°C | 5.0°C | 47 | 5.5 | 10.410 h |
| December | 7.8°C-0.7°C | -0.7°C | 28 | 3.8 | 9.910 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
- Kwangyang in SeptemberSouth Korea · 10 kmHigh 25.7°C · Low 18.8°C · 160 mm rain
- Gwangyang in SeptemberSouth Korea · 19 kmHigh 25.4°C · Low 18.6°C · 170 mm rain
- Yeosu in SeptemberSouth Korea · 26 kmHigh 24.5°C · Low 20.1°C · 160 mm rain
- Nangen in SeptemberSouth Korea · 52 kmHigh 25.5°C · Low 17.0°C · 140 mm rain
- Gwangju in SeptemberSouth Korea · 57 kmHigh 25.7°C · Low 17.2°C · 138 mm rain
- Chinju in SeptemberSouth Korea · 61 kmHigh 25.4°C · Low 17.3°C · 192 mm rain
- Masan in SeptemberSouth Korea · 63 kmHigh 25.8°C · Low 17.5°C · 145 mm rain
- Tongyeong in SeptemberSouth Korea · 86 kmHigh 24.8°C · Low 20.1°C · 174 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 Suncheon) is explained once on the Suncheon year overview and on the Sources, method and limits page.
Kwangyang lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.