Chengdu weather by month
Chengdu runs from about 7°C in December to 29°C in August, with July the wettest month at 306 mm.
warmest month
August
29°C
coolest month
December
7°C
wettest month
July
306 mm
worst air month
December
101 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 8°C | 23 mm | 125 h | 99 |
| February | 8°C | 11 mm | 150 h | 78 |
| March | 15°C | 50 mm | 188 h | 58 |
| April | 20°C | 94 mm | 188 h | 55 |
| May | 23°C | 65 mm | 226 h | 43 |
| June | 26°C | 51 mm | 204 h | 38 |
| July | 27°C | 306 mm | 207 h | 63 |
| August | 29°C | 91 mm | 313 h | 59 |
| September | 26°C | 194 mm | 275 h | 56 |
| October | 18°C | 64 mm | 144 h | 53 |
| November | 14°C | 16 mm | 119 h | 85 |
| December | 7°C | 19 mm | 125 h | 101 |
About 2,264 hours of sun a year. Roughly 97 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.