Hefei weather by month
Hefei runs from about 4°C in January to 30°C in August, with July the wettest month at 345 mm.
warmest month
August
30°C
coolest month
January
4°C
wettest month
July
345 mm
worst air month
January
66 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 4°C | 57 mm | 188 h | 66 |
| February | 4°C | 89 mm | 144 h | 53 |
| March | 12°C | 65 mm | 233 h | 55 |
| April | 18°C | 123 mm | 179 h | 43 |
| May | 22°C | 120 mm | 282 h | 25 |
| June | 26°C | 181 mm | 241 h | 37 |
| July | 29°C | 345 mm | 228 h | 21 |
| August | 30°C | 54 mm | 346 h | 26 |
| September | 27°C | 68 mm | 288 h | 31 |
| October | 18°C | 66 mm | 206 h | 36 |
| November | 13°C | 29 mm | 210 h | 48 |
| December | 5°C | 12 mm | 245 h | 60 |
About 2,790 hours of sun a year. Roughly 117 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.