Xi'an weather by month
Xi'an runs from about 1°C in January to 29°C in August, with July the wettest month at 207 mm.
warmest month
August
29°C
coolest month
January
1°C
wettest month
July
207 mm
worst air month
January
91 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 1°C | 6 mm | 229 h | 91 |
| February | 3°C | 16 mm | 164 h | 72 |
| March | 12°C | 25 mm | 255 h | 67 |
| April | 19°C | 31 mm | 218 h | 50 |
| May | 24°C | 46 mm | 280 h | 38 |
| June | 27°C | 28 mm | 265 h | 37 |
| July | 27°C | 207 mm | 216 h | 36 |
| August | 29°C | 50 mm | 319 h | 40 |
| September | 26°C | 58 mm | 296 h | 47 |
| October | 16°C | 37 mm | 225 h | 57 |
| November | 10°C | 43 mm | 158 h | 63 |
| December | 2°C | 2 mm | 223 h | 85 |
About 2,848 hours of sun a year. Roughly 57 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.