Average temperature in September is 14.8 °C
Average daytime temperature is 18.1 °C
Average night temperature is 11.3 °C
Absolute maximum temperature: 24.9 °C
Absolute minimum temperature: 4.8 °C
Number of sunny days: 6
Number of rainy days: 24
Number of snow days:
Precipitation sum: 136 mm
* Weather data for Castlereagh United Kingdom 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 | 17.7 | 20.3 | 21 | 23 | 22.5 | 24.4 | 23.4 | 24.9 | 24.3 | 22.7 | 18.3 | 16.1 | 14.4 | 17.4 | 12.9 | 14.3 | 16.2 | 14.7 | 18.2 | 17.1 | 14.4 | 13.5 | 14.9 | 17.3 | 18 | 17.3 | 15.3 | 16.4 | 16.3 | 16.8 |
| Apparent max temperature | 17.9 | 20.5 | 20.8 | 24.3 | 23 | 25.7 | 26.1 | 27.9 | 24.7 | 24.1 | 19.1 | 13.4 | 12.2 | 15.9 | 12.4 | 12.2 | 16.2 | 15.4 | 15.7 | 14.8 | 11.4 | 9.3 | 13 | 16.3 | 15.1 | 14.1 | 13.4 | 12.7 | 13.3 | 15.8 |
| Mean temperature | 15 | 15.8 | 16.6 | 16.5 | 18.4 | 18.9 | 18.6 | 19.6 | 19.6 | 17.9 | 16.2 | 12.5 | 12 | 14.2 | 12.4 | 12.7 | 14.7 | 13 | 14.4 | 14.3 | 10.8 | 11.3 | 11.1 | 15.8 | 15.3 | 14.6 | 13.3 | 14 | 13.3 | 12.1 |
| Apparent mean temperature | 11.9 | 10 | 12.8 | 9.4 | 14.6 | 15.3 | 13.7 | 15.8 | 16.8 | 14.7 | 11.9 | 5.8 | 4.8 | 10.2 | 9.2 | 7.6 | 11.3 | 6.2 | 7.7 | 6.6 | 4.9 | 6.7 | 2.8 | 10.7 | 10.1 | 8.6 | 8.5 | 9.1 | 8.2 | 6.6 |
| Minimum temperature | 12.2 | 10.8 | 13.5 | 10.3 | 14.4 | 14.9 | 13.6 | 14.5 | 15.8 | 14.1 | 13.6 | 7.6 | 7 | 11.5 | 11.8 | 10.9 | 12.6 | 10.2 | 11 | 9.5 | 7.8 | 9.5 | 4.8 | 13.7 | 13.4 | 10.4 | 10 | 11.8 | 10.9 | 8.1 |
| Apparent min temperature | 14.6 | 15.9 | 16.2 | 17 | 18.6 | 19.8 | 20.1 | 21.8 | 21.1 | 19.3 | 15.9 | 10.5 | 9.9 | 12.8 | 11.1 | 9.8 | 14 | 10 | 12.3 | 11.1 | 8.2 | 7.9 | 8.3 | 13.9 | 12.1 | 11.9 | 10.5 | 10.9 | 10.5 | 10.7 |
| 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) | 13.8 | 13.7 | 13.6 | 13.6 | 13.5 | 13.4 | 13.3 | 13.3 | 13.2 | 13.1 | 13 | 13 | 12.9 | 12.8 | 12.8 | 12.7 | 12.6 | 12.5 | 12.5 | 12.4 | 12.3 | 12.3 | 12.2 | 12.1 | 12 | 12 | 11.9 | 11.8 | 11.7 | 11.7 |
| Sunshine duration (h) | 7.7 | 11.7 | 12.2 | 12.4 | 11.3 | 12 | 10.5 | 10.8 | 10 | 8.2 | 5 | 11.6 | 0.5 | 9.9 | 0 | 0.3 | 0.1 | 9 | 1.3 | 11 | 6.8 | 10.8 | 8.1 | 2 | 10.7 | 6 | 0 | 1.8 | 10.5 | 0 |
| Precipitation (mm) | 2.9 | 0.6 | 0 | 0 | 0 | 0 | 1.5 | 0 | 10.2 | 3.9 | 2.4 | 0 | 6.7 | 0.4 | 16.6 | 3.4 | 9.1 | 11.2 | 9.8 | 7.5 | 2 | 0.4 | 3.1 | 3.6 | 0.1 | 7.6 | 24.6 | 1.5 | 0.1 | 6.4 |
| Precipitation hours | 11 | 5 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | 6 | 11 | 0 | 11 | 3 | 24 | 10 | 15 | 8 | 16 | 11 | 5 | 3 | 6 | 10 | 1 | 9 | 13 | 3 | 1 | 9 |
| Wind speed (m/s) | 17.1 | 14 | 15.8 | 9.9 | 13.6 | 14.6 | 12.4 | 8.9 | 18.7 | 12.4 | 14.1 | 16.3 | 24.9 | 17.7 | 18.4 | 23.6 | 16.3 | 26.8 | 30.8 | 34.2 | 21.6 | 28.2 | 29.5 | 40.3 | 27.7 | 31.5 | 37.1 | 32 | 28 | 25.5 |
In September 2023, the highest daytime temperature in Castlereagh was 24.9°C.
While the minimum temperature at night dropped to 4.8°C.
The average nighttime and daytime temperatures during September in Castlereagh are 11.3°C and 18.1°C respectively.
The precipitation sum in September is about 136 mm.