Average temperature in September is 11.3 °C
Average daytime temperature is 12.4 °C
Average night temperature is 10.3 °C
Absolute maximum temperature: 15 °C
Absolute minimum temperature: 7.3 °C
Number of sunny days: 2
Number of rainy days: 28
Number of snow days:
Precipitation sum: 187 mm
* Weather data for Edinburgh Of The Seven Seas Saint Helena 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 | 10.6 | 9.9 | 11.5 | 12.5 | 13.5 | 14.5 | 14.3 | 9.1 | 8.9 | 11.9 | 13.5 | 12.3 | 14.1 | 13.7 | 13.5 | 14.3 | 12.5 | 13 | 13.7 | 12.1 | 10.6 | 11 | 13.8 | 14 | 15 | 13.9 | 12.1 | 10.3 | 11 | 11.5 |
| Apparent max temperature | 6.7 | 6.4 | 8 | 7.7 | 7.2 | 7.1 | 8.3 | 0.4 | 0.5 | 6.2 | 7.6 | 6.2 | 7.4 | 7.5 | 9.3 | 8.8 | 7.9 | 7.1 | 9.7 | 7.8 | 4.6 | 7.6 | 6.5 | 9.8 | 9.9 | 9.7 | 6 | 3.9 | 4.7 | 3.7 |
| Mean temperature | 10 | 9.6 | 10.2 | 12 | 12.9 | 14 | 10.9 | 8.2 | 8.2 | 9.4 | 12.7 | 11.9 | 12.5 | 11.9 | 11.8 | 13.5 | 11.9 | 12.4 | 12.7 | 11 | 9.9 | 10.1 | 12.9 | 11 | 14.3 | 12.7 | 10.9 | 9.9 | 10 | 10.3 |
| Apparent mean temperature | 5.4 | 5.1 | 4.9 | 6.9 | 6.8 | 5.7 | -0.7 | -1 | -2.5 | 0.8 | 3.8 | 3.1 | 4.3 | 4.1 | 6.4 | 3.8 | 3.3 | 4.3 | 6.3 | 3.4 | 1.3 | 0.8 | 2.9 | 5.1 | 5.3 | 6.7 | 1.1 | 2 | 1.3 | -0.7 |
| Minimum temperature | 9.7 | 9.1 | 8.9 | 11.5 | 12.2 | 13.3 | 8.2 | 7.3 | 7.7 | 8.3 | 11.9 | 11.2 | 11 | 10.5 | 10.2 | 12.6 | 11.6 | 11.9 | 11.8 | 10.2 | 9.2 | 8.2 | 10.9 | 9.7 | 12.4 | 12.1 | 9.2 | 9.6 | 9.5 | 8.9 |
| Apparent min temperature | 6 | 5.8 | 6.9 | 7.4 | 7 | 6.5 | 4.1 | -0.4 | -1.5 | 3.4 | 5.4 | 4.7 | 6.1 | 5.6 | 7.9 | 7 | 5.7 | 5.5 | 7.6 | 4.7 | 3 | 5.2 | 4.7 | 6.8 | 7.3 | 7.9 | 3.9 | 2.9 | 3.2 | 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) | 11.3 | 11.3 | 11.4 | 11.4 | 11.5 | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 12 | 12 | 12 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 |
| Sunshine duration (h) | 10.2 | 10 | 10.4 | 9.9 | 8.7 | 10.1 | 7.8 | 10.6 | 10.6 | 8 | 0 | 9 | 7.2 | 7.8 | 3.3 | 6.9 | 9.9 | 9.9 | 0 | 9.8 | 9.5 | 11 | 4 | 10.8 | 0 | 10.4 | 11.4 | 11.2 | 1.7 | 0 |
| Precipitation (mm) | 0.1 | 0.3 | 0.3 | 0 | 1.6 | 3.6 | 6.2 | 4.6 | 4.2 | 0.6 | 16.5 | 2.4 | 1.6 | 3 | 0.5 | 2.1 | 0 | 1.3 | 11.3 | 0.4 | 3 | 8.5 | 11.9 | 13.2 | 26 | 6.5 | 5.9 | 1.2 | 8.2 | 41.6 |
| Precipitation hours | 1 | 3 | 1 | 0 | 8 | 6 | 16 | 21 | 15 | 5 | 15 | 10 | 8 | 11 | 3 | 8 | 0 | 5 | 14 | 4 | 10 | 6 | 10 | 7 | 20 | 14 | 12 | 10 | 5 | 24 |
| Wind speed (m/s) | 22.9 | 23 | 22.9 | 36.1 | 48 | 59 | 53.4 | 55.5 | 63.6 | 48.5 | 60.2 | 59.3 | 59 | 59.5 | 37.7 | 58.3 | 58.2 | 55 | 52.2 | 39.6 | 46.1 | 43 | 62.4 | 54.5 | 72.3 | 45.8 | 50.8 | 45.7 | 57.9 | 71.4 |
In September 2023, the highest daytime temperature in Edinburgh Of The Seven Seas was 15°C.
While the minimum temperature at night dropped to 7.3°C.
The average nighttime and daytime temperatures during September in Edinburgh Of The Seven Seas are 10.3°C and 12.4°C respectively.
The precipitation sum in September is about 187 mm.