Gdynia weather by month
Gdynia runs from about 0°C in January to 19°C in August, with July the wettest month at 164 mm.
warmest month
August
19°C
coolest month
January
0°C
wettest month
July
164 mm
worst air month
March
19 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 0°C | 73 mm | 84 h | 16 |
| February | 4°C | 100 mm | 81 h | 13 |
| March | 6°C | 47 mm | 210 h | 19 |
| April | 9°C | 54 mm | 237 h | 7 |
| May | 15°C | 28 mm | 419 h | 7 |
| June | 17°C | 64 mm | 387 h | 6 |
| July | 19°C | 164 mm | 388 h | 6 |
| August | 19°C | 54 mm | 382 h | 6 |
| September | 17°C | 46 mm | 276 h | 6 |
| October | 11°C | 38 mm | 208 h | 7 |
| November | 5°C | 54 mm | 99 h | 17 |
| December | 4°C | 69 mm | 63 h | 16 |
About 2,834 hours of sun a year. Roughly 78 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.