Weather in Constanța for September 2025
Until now, September 2025 in Constanța has been nearly identical to the historical average, with a temperature of 25.4 °C (showing only a slight deviation of -0.1 °C).
Expect cooler weather in the next days in Constanța with the forecast suggesting a temperature of 21.8 °C, lower than the historical average.
In general, the average temperature in Constanța at the beginning of September is 26 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.6 °C by the end of September.
Constanța experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 31.8 mm.
Temperatures
Rain 🌧️
Constanța Weather September
What’s the Weather Like in Constanța This September?
Temperatures trend during September in Constanța
September weather in Constanța day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 29° /19° | 0.3 mm | 7 | |
| 2 Sept. |  Sunny | 27° /20° | 0.6 mm | 7 | |
| 3 Sept. |  Partly cloudy | 26° /18° | 10.7 mm | 6 | |
| 4 Sept. | Sunny | 26° /17° | 0.1 mm | 7 | |
| 5 Sept. |  Moderate rain at times | 25° /17° | 0.7 mm | 6 | |
| 6 Sept. | Patchy rain possible | 24° /17° | 1.2 mm | 5 | |
| 7 Sept. | Sunny | 25° /17° | 0.5 mm | 6 | |
| 8 Sept. | Sunny | 25° /17° | 0.5 mm | 6 | |
| 9 Sept. | Sunny | 25° /17° | 0 mm | 7 | |
| 10 Sept. | Partly cloudy | 24° /18° | 0.3 mm | 6 | |
| 11 Sept. | Patchy rain possible | 25° /17° | 1.9 mm | 6 | |
| 12 Sept. | Partly cloudy | 25° /17° | 1.3 mm | 6 | |
| 13 Sept. | Partly cloudy | 24° /17° | 0.2 mm | 6 | |
| 14 Sept. | Sunny | 26° /17° | 0.4 mm | 6 | |
| 15 Sept. | Partly cloudy | 26° /17° | 0.1 mm | 7 | |
| 16 Sept. | Patchy rain possible | 25° /18° | 0.2 mm | 6 | |
| 17 Sept. |  Moderate rain | 24° /16° | 16 mm | 0.8 | |
| 18 Sept. | Patchy rain possible | 22° /15° | 0.1 mm | 1.2 | |
| 19 Sept. | Sunny | 23° /15° | 0 mm | 1.3 | |
| 20 Sept. | Sunny | 22° /18° | 0 mm | 1.7 | |
| 21 Sept. | Sunny | 23° /18° | 0 mm | 5 | |
| 22 Sept. | Sunny | 23° /20° | 0 mm | 6 | |
| 23 Sept. | Sunny | 24° /19° | 0 mm | 6 | |
| 24 Sept. | Sunny | 25° /20° | 0 mm | 6 | |
| 25 Sept. | Sunny | 26° /20° | 0 mm | 6 | |
| 26 Sept. | Patchy rain possible | 19° /17° | 1.3 mm | 4 | |
| 27 Sept. | Patchy rain possible | 18° /17° | 0.4 mm | 4 | |
| 28 Sept. | Partly cloudy | 17° /15° | 0 mm | 5 | |
| 29 Sept. | Partly cloudy | 17° /13° | 0 mm | 4 | |
| 30 Sept. | Sunny | 22° /14° | 1.6 mm | 5 | |
| Next | |||||
Constanța in September - FAQ
Constanța water temperatures in September
The average water temperature of the Black Sea near Constanța in September is 22.3 °C. At the beginning of September temperatures are around 22.4 °C; by the end of the month they get a bit cooler and reach 21.7 °C.
- What is the water temperature in Constanța in September?
- The average water temperature in Constanța in September is 22.3 °C.
- Can you swim in Constanța in September?
- Comfortably warm for most people. Sensitive swimmers might prefer a light rash-guard, but wetsuits are rarely needed.
September rainfall patterns in Constanța
UV exposure in Constanța during September
Quick links
Where is Constanța?Get accurate weather forecasts for Constanța, located at latitude 44.181 and longitude 28.634. Stay updated with localized weather information tailored for Constanța.