Average temperature in September is 14.3 °C
Average daytime temperature is 17.6 °C
Average night temperature is 11.2 °C
Absolute maximum temperature: 25.8 °C
Absolute minimum temperature: 5.8 °C
Number of sunny days: 7
Number of rainy days: 23
Number of snow days:
Precipitation sum: 183 mm
* Weather data for Dumbarton 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 | 19.6 | 19 | 21 | 22.4 | 24 | 25.8 | 25.2 | 21.9 | 23.1 | 17.5 | 16.3 | 14.8 | 16.1 | 13.3 | 15 | 15.6 | 14.4 | 16.3 | 16.4 | 12.9 | 14.6 | 13.5 | 18.5 | 16.8 | 15.3 | 15 | 15.7 | 15.6 | 14.6 |
| Apparent max temperature | 16.1 | 18.9 | 17.9 | 20.9 | 22.5 | 25.6 | 28 | 28.7 | 22.9 | 25.5 | 19.2 | 14.8 | 11.7 | 13.4 | 12.6 | 12.4 | 14.6 | 13.7 | 13.2 | 14 | 9.8 | 11.9 | 10.4 | 17.6 | 13.6 | 13.7 | 14.6 | 12.6 | 10.9 | 13.3 |
| Mean temperature | 14.4 | 14.5 | 15.9 | 16.4 | 16.6 | 17.6 | 19 | 19.2 | 18.4 | 18.5 | 15.7 | 13.3 | 11.4 | 13.7 | 11.8 | 12.2 | 13.1 | 12.7 | 12.5 | 14.3 | 11.2 | 11.6 | 10.6 | 15.7 | 14.8 | 13.8 | 11.8 | 14.4 | 13.3 | 12 |
| Apparent mean temperature | 10.3 | 7.4 | 12.4 | 10.9 | 12.4 | 12.8 | 14.6 | 16.7 | 17 | 17.9 | 10.7 | 7.9 | 5.9 | 9.5 | 9.7 | 8.6 | 8.4 | 6.1 | 7.1 | 8.1 | 7.2 | 7.1 | 3.3 | 9.7 | 9.7 | 9.8 | 6.2 | 9.6 | 7.9 | 7.2 |
| Minimum temperature | 11.2 | 8.5 | 12.3 | 11.4 | 12.3 | 13 | 14.2 | 15.4 | 16 | 16.3 | 12.1 | 9.4 | 7.6 | 10.7 | 10.4 | 10.4 | 10.3 | 9.8 | 10.2 | 11 | 9.9 | 9.4 | 5.8 | 12 | 13.7 | 11 | 7.9 | 13 | 11.9 | 8.6 |
| Apparent min temperature | 13.2 | 14 | 15.4 | 16.4 | 16.5 | 18.2 | 20.8 | 21.5 | 19.6 | 20.2 | 14.7 | 11.9 | 9.2 | 11.3 | 11.2 | 10.2 | 11.7 | 10.3 | 10 | 11 | 8.4 | 9.4 | 8.2 | 13.8 | 11.5 | 11.8 | 9.7 | 10.9 | 9.5 | 10.6 |
| 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) | 13.9 | 13.8 | 13.7 | 13.6 | 13.6 | 13.5 | 13.4 | 13.3 | 13.3 | 13.2 | 13.1 | 13 | 12.9 | 12.9 | 12.8 | 12.7 | 12.6 | 12.6 | 12.5 | 12.4 | 12.3 | 12.3 | 12.2 | 12.1 | 12 | 12 | 11.9 | 11.8 | 11.7 | 11.6 |
| Sunshine duration (h) | 5.9 | 9 | 10 | 12.4 | 10.8 | 12.2 | 6.5 | 9.7 | 6.5 | 5.5 | 7.6 | 11.7 | 1.3 | 11.6 | 0 | 7.9 | 0 | 6.9 | 0 | 9.5 | 3.1 | 9.3 | 10.3 | 1.3 | 8.6 | 4.3 | 0.9 | 8.6 | 9.5 | 0 |
| Precipitation (mm) | 0.3 | 0 | 0 | 0 | 0 | 0 | 0.4 | 0 | 0.9 | 30 | 1.7 | 0 | 4.9 | 1.2 | 10.2 | 5.5 | 3.2 | 17.1 | 17.8 | 10.7 | 2.8 | 0.6 | 3.5 | 24.9 | 2.8 | 14.1 | 20.2 | 4.1 | 1.1 | 4.7 |
| Precipitation hours | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 8 | 10 | 7 | 0 | 10 | 5 | 17 | 10 | 10 | 17 | 21 | 15 | 10 | 3 | 5 | 16 | 10 | 11 | 14 | 10 | 7 | 10 |
| Wind speed (m/s) | 18.6 | 13.9 | 19.8 | 15.6 | 16.2 | 12 | 9.7 | 6.3 | 16 | 11.4 | 18 | 8.5 | 26.9 | 24 | 8 | 15.7 | 19.5 | 24.5 | 34.5 | 33.2 | 27.4 | 19.5 | 16.3 | 38.7 | 29.9 | 23.6 | 27.6 | 33.5 | 35.5 | 18.7 |
In September 2023, the highest daytime temperature in Dumbarton was 25.8°C.
While the minimum temperature at night dropped to 5.8°C.
The average nighttime and daytime temperatures during September in Dumbarton are 11.2°C and 17.6°C respectively.
The precipitation sum in September is about 183 mm.