Constanta weather by month
Constanta runs from about 3°C in January to 26°C in July, with September the wettest month at 124 mm.
warmest month
July
26°C
coolest month
January
3°C
wettest month
September
124 mm
worst air month
December
15 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 3°C | 23 mm | 166 h | 12 |
| February | 8°C | 6 mm | 183 h | 10 |
| March | 8°C | 51 mm | 230 h | 12 |
| April | 15°C | 81 mm | 314 h | 7 |
| May | 15°C | 51 mm | 359 h | 7 |
| June | 23°C | 20 mm | 413 h | 7 |
| July | 26°C | 28 mm | 427 h | 7 |
| August | 25°C | 98 mm | 371 h | 6 |
| September | 20°C | 124 mm | 308 h | 7 |
| October | 14°C | 64 mm | 290 h | 6 |
| November | 7°C | 51 mm | 173 h | 11 |
| December | 6°C | 109 mm | 98 h | 15 |
About 3,332 hours of sun a year. Roughly 70 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.