Xiamen weather by month
Xiamen runs from about 14°C in January to 30°C in July, with September the wettest month at 275 mm.
warmest month
July
30°C
coolest month
January
14°C
wettest month
September
275 mm
worst air month
February
46 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 14°C | 41 mm | 250 h | 37 |
| February | 15°C | 31 mm | 215 h | 46 |
| March | 18°C | 55 mm | 235 h | 33 |
| April | 23°C | 206 mm | 188 h | 33 |
| May | 23°C | 267 mm | 218 h | 29 |
| June | 27°C | 210 mm | 258 h | 21 |
| July | 30°C | 250 mm | 348 h | 24 |
| August | 29°C | 223 mm | 304 h | 27 |
| September | 28°C | 275 mm | 279 h | 30 |
| October | 26°C | 14 mm | 276 h | 24 |
| November | 22°C | 60 mm | 252 h | 23 |
| December | 16°C | 2 mm | 290 h | 32 |
About 3,113 hours of sun a year. Roughly 164 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.