Gdańsk weather by month
Gdańsk runs from about 0°C in January to 20°C in August, with July the wettest month at 163 mm.
warmest month
August
20°C
coolest month
January
0°C
wettest month
July
163 mm
worst air month
January
25 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 0°C | 70 mm | 90 h | 25 |
| February | 4°C | 96 mm | 86 h | 21 |
| March | 6°C | 42 mm | 210 h | 23 |
| April | 9°C | 50 mm | 234 h | 9 |
| May | 15°C | 30 mm | 413 h | 8 |
| June | 17°C | 72 mm | 385 h | 7 |
| July | 19°C | 163 mm | 388 h | 6 |
| August | 20°C | 42 mm | 379 h | 7 |
| September | 18°C | 39 mm | 276 h | 8 |
| October | 11°C | 38 mm | 204 h | 10 |
| November | 5°C | 46 mm | 100 h | 22 |
| December | 4°C | 62 mm | 66 h | 22 |
About 2,831 hours of sun a year. Roughly 75 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.