Gwangju weather by month
Gwangju runs from about 2°C in January to 28°C in August, with July the wettest month at 291 mm.
warmest month
August
28°C
coolest month
January
2°C
wettest month
July
291 mm
worst air month
March
35 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 2°C | 53 mm | 192 h | 18 |
| February | 5°C | 141 mm | 143 h | 25 |
| March | 7°C | 85 mm | 256 h | 35 |
| April | 15°C | 114 mm | 223 h | 26 |
| May | 17°C | 149 mm | 313 h | 24 |
| June | 22°C | 135 mm | 247 h | 19 |
| July | 26°C | 291 mm | 227 h | 16 |
| August | 28°C | 71 mm | 367 h | 17 |
| September | 25°C | 162 mm | 281 h | 15 |
| October | 17°C | 107 mm | 214 h | 15 |
| November | 10°C | 80 mm | 235 h | 23 |
| December | 3°C | 5 mm | 204 h | 17 |
About 2,902 hours of sun a year. Roughly 140 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.