Dalian weather by month
Dalian runs from about -2°C in January to 26°C in August, with July the wettest month at 405 mm.
warmest month
August
26°C
coolest month
January
-2°C
wettest month
July
405 mm
worst air month
March
62 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -2°C | 7 mm | 252 h | 23 |
| February | -2°C | 13 mm | 219 h | 44 |
| March | 5°C | 34 mm | 307 h | 62 |
| April | 12°C | 40 mm | 304 h | 44 |
| May | 17°C | 72 mm | 326 h | 27 |
| June | 22°C | 45 mm | 327 h | 32 |
| July | 25°C | 405 mm | 268 h | 28 |
| August | 26°C | 155 mm | 306 h | 28 |
| September | 21°C | 40 mm | 296 h | 35 |
| October | 15°C | 46 mm | 251 h | 25 |
| November | 10°C | 26 mm | 217 h | 33 |
| December | 1°C | 0 mm | 241 h | 24 |
About 3,314 hours of sun a year. Roughly 79 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.