Average temperature in September is 17.2 °C
Average daytime temperature is 22.6 °C
Average night temperature is 11.9 °C
Absolute maximum temperature: 29.3 °C
Absolute minimum temperature: 4.6 °C
Number of sunny days: 16
Number of rainy days: 14
Number of snow days:
Precipitation sum: 47 mm
* Weather data for Capellen Luxembourg is based on climate observations for 2023 year
| September (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 19.2 | 24.5 | 23.6 | 25.1 | 27.2 | 26.7 | 27.1 | 28.5 | 29 | 28.7 | 29.3 | 25.8 | 20.9 | 20.6 | 22.2 | 22.9 | 24.6 | 21.9 | 18 | 22 | 20.8 | 15.6 | 14.9 | 17.2 | 19.1 | 21.3 | 22.3 | 22.1 | 19.3 | 18.1 |
| Apparent max temperature | 19 | 26.8 | 25.2 | 24.8 | 27.5 | 26.8 | 27.8 | 31 | 30.9 | 30 | 30.7 | 28 | 19.9 | 20.2 | 22.1 | 24.3 | 26.3 | 20.4 | 14.1 | 19.9 | 19.9 | 12.4 | 12.1 | 15.2 | 18.8 | 21.5 | 22.4 | 21.7 | 17 | 17.5 |
| Mean temperature | 16.2 | 18.3 | 18.7 | 18.9 | 20.4 | 19.9 | 20.2 | 21.2 | 21.8 | 21.8 | 22.2 | 19.4 | 17.3 | 15.3 | 16.4 | 17.6 | 19.9 | 18.5 | 15.1 | 17.8 | 16.5 | 12.1 | 10.7 | 10.9 | 12.7 | 14 | 16.4 | 16.9 | 16.3 | 13.7 |
| Apparent mean temperature | 13.5 | 12.5 | 14.5 | 11.7 | 12.8 | 12.1 | 12.9 | 13.6 | 14.1 | 14.9 | 14.5 | 16.8 | 12.2 | 9.5 | 7.9 | 11.8 | 15.4 | 13.2 | 9.9 | 13.4 | 10.8 | 6.5 | 4.7 | 2.8 | 4.1 | 4 | 7.7 | 11 | 11.8 | 8.9 |
| Minimum temperature | 13.4 | 12.6 | 14.9 | 12.7 | 14.2 | 12.6 | 13.5 | 13.8 | 13.9 | 14.8 | 14.9 | 15.9 | 12.9 | 10.2 | 9.1 | 12.3 | 14.9 | 14.8 | 12 | 14.5 | 12.4 | 8.9 | 6.7 | 4.6 | 6.6 | 6.3 | 9.1 | 12.2 | 12.3 | 9.4 |
| Apparent min temperature | 15.6 | 19.3 | 19.1 | 18 | 20 | 19.7 | 20.5 | 22.4 | 23.4 | 22.8 | 23.2 | 20.8 | 17 | 14.8 | 15.8 | 18 | 21 | 17.4 | 12.4 | 16.1 | 15.3 | 9.3 | 8.3 | 9.1 | 11.3 | 13.1 | 16 | 16.7 | 15.4 | 13.1 |
| September | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.1 | 13.1 | 13 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12 | 12 | 11.9 | 11.9 | 11.8 | 11.7 |
| Sunshine duration (h) | 4.9 | 11.8 | 11.7 | 12.3 | 12.2 | 12.1 | 12.1 | 12 | 11.9 | 11.8 | 11.6 | 7.1 | 11.2 | 11.3 | 10.9 | 10.8 | 10.3 | 8.4 | 7.6 | 9 | 3.1 | 10.2 | 7.1 | 9.4 | 11 | 10.9 | 10.1 | 10.3 | 7 | 10.7 |
| Precipitation (mm) | 5.1 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 8.5 | 0.6 | 0 | 0 | 9.2 | 0.1 | 4.3 | 0.2 | 0.4 | 13.5 | 3 | 0.8 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Precipitation hours | 15 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 5 | 0 | 0 | 7 | 1 | 9 | 1 | 4 | 9 | 9 | 5 | 0 | 0 | 0 | 0 | 0 | 9 | 0 |
| Wind speed (m/s) | 24 | 10.5 | 13.3 | 18.8 | 15.9 | 13.8 | 13.2 | 8.7 | 9.2 | 10.1 | 9.2 | 11.7 | 15.3 | 8.7 | 10.1 | 16.3 | 11.1 | 24.3 | 27.5 | 26.2 | 22.6 | 22.4 | 18.3 | 13.7 | 11.5 | 9.9 | 11 | 12.5 | 27.1 | 8.6 |
In September 2023, the highest daytime temperature in Capellen was 29.3°C.
While the minimum temperature at night dropped to 4.6°C.
The average nighttime and daytime temperatures during September in Capellen are 11.9°C and 22.6°C respectively.
The precipitation sum in September is about 47 mm.