Shanghai weather by month
Shanghai runs from about 5°C in January to 31°C in August, with June the wettest month at 337 mm.
warmest month
August
31°C
coolest month
January
5°C
wettest month
June
337 mm
worst air month
January
74 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 5°C | 41 mm | 211 h | 74 |
| February | 6°C | 134 mm | 129 h | 73 |
| March | 11°C | 44 mm | 234 h | 43 |
| April | 16°C | 154 mm | 158 h | 47 |
| May | 20°C | 100 mm | 270 h | 32 |
| June | 24°C | 337 mm | 159 h | 30 |
| July | 30°C | 184 mm | 283 h | 30 |
| August | 31°C | 65 mm | 364 h | 49 |
| September | 27°C | 198 mm | 258 h | 40 |
| October | 20°C | 152 mm | 182 h | 31 |
| November | 15°C | 138 mm | 192 h | 65 |
| December | 7°C | 17 mm | 225 h | 73 |
About 2,665 hours of sun a year. Roughly 152 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.