Tongyeong weather by month
Tongyeong runs from about 4°C in January to 28°C in August, with June the wettest month at 276 mm.
warmest month
August
28°C
coolest month
January
4°C
wettest month
June
276 mm
worst air month
March
26 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 4°C | 47 mm | 233 h | 14 |
| February | 7°C | 136 mm | 162 h | 17 |
| March | 9°C | 103 mm | 261 h | 26 |
| April | 15°C | 158 mm | 225 h | 17 |
| May | 18°C | 108 mm | 324 h | 14 |
| June | 22°C | 276 mm | 252 h | 12 |
| July | 25°C | 239 mm | 264 h | 10 |
| August | 28°C | 70 mm | 373 h | 10 |
| September | 26°C | 203 mm | 303 h | 8 |
| October | 19°C | 274 mm | 233 h | 10 |
| November | 13°C | 152 mm | 243 h | 15 |
| December | 5°C | 0 mm | 266 h | 14 |
About 3,139 hours of sun a year. Roughly 177 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.