Beijing weather by month
Beijing runs from about -3°C in January to 28°C in June, with August the wettest month at 300 mm.
warmest month
June
28°C
coolest month
January
-3°C
wettest month
August
300 mm
worst air month
December
131 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -3°C | 0 mm | 239 h | 116 |
| February | 0°C | 6 mm | 224 h | 102 |
| March | 8°C | 7 mm | 292 h | 93 |
| April | 16°C | 33 mm | 257 h | 58 |
| May | 22°C | 51 mm | 306 h | 48 |
| June | 28°C | 26 mm | 320 h | 49 |
| July | 27°C | 213 mm | 275 h | 62 |
| August | 26°C | 300 mm | 278 h | 80 |
| September | 21°C | 50 mm | 241 h | 79 |
| October | 13°C | 23 mm | 228 h | 94 |
| November | 8°C | 17 mm | 220 h | 108 |
| December | 0°C | 0 mm | 241 h | 131 |
About 3,121 hours of sun a year. Roughly 73 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.