Average temperature in September is 18.1 °C
Average daytime temperature is 23.3 °C
Average night temperature is 13 °C
Absolute maximum temperature: 28.8 °C
Absolute minimum temperature: 6.8 °C
Number of sunny days: 21
Number of rainy days: 9
Number of snow days:
Precipitation sum: 71 mm
* Weather data for Affoltern Am Albis Switzerland is based on climate observations for 2023 year
| Settembre (°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 | 24 | 25.4 | 24.9 | 25.5 | 25.3 | 25.4 | 26.8 | 28 | 28.2 | 28.5 | 28.8 | 26.3 | 21.4 | 21.1 | 22.2 | 25.6 | 26.9 | 19.5 | 20.8 | 22.3 | 23.5 | 16.3 | 14.8 | 17.5 | 18.6 | 20.6 | 20.6 | 23.9 | 24.6 | 20.7 |
| Apparent max temperature | 24.5 | 26.5 | 26.4 | 26.8 | 27.4 | 27.8 | 29.9 | 31.5 | 30.9 | 30.9 | 31.4 | 28.4 | 22.7 | 20.9 | 23.8 | 27.6 | 29.3 | 21 | 20.3 | 23.4 | 25.4 | 15.6 | 13.5 | 14.9 | 18.9 | 21.4 | 21.4 | 24.7 | 24.8 | 21 |
| Mean temperature | 18.4 | 19.7 | 19.7 | 19.4 | 18.4 | 18.7 | 20.8 | 22.4 | 22.5 | 22.8 | 22.5 | 21 | 18.7 | 17.7 | 17.7 | 18.9 | 21 | 17.4 | 17 | 17.4 | 18.2 | 13.8 | 12.2 | 11.7 | 12.8 | 14.9 | 15 | 17.6 | 16.6 | 17 |
| Apparent mean temperature | 12.2 | 15 | 13.8 | 14.7 | 12 | 12 | 14.7 | 18.2 | 17.6 | 18.2 | 16.3 | 16.1 | 17.8 | 14.8 | 13.7 | 14.6 | 17 | 15.5 | 13.6 | 10.5 | 13.3 | 10.8 | 9.6 | 5.6 | 5.5 | 7.5 | 9.9 | 10.6 | 8.7 | 12.6 |
| Minimum temperature | 12.5 | 14.7 | 13.7 | 14.4 | 12.2 | 12.3 | 14.5 | 16.8 | 16.4 | 17.1 | 15.2 | 14.9 | 16.7 | 14.1 | 13.4 | 13.6 | 16.2 | 15 | 14.1 | 10.9 | 13.2 | 11.3 | 10.5 | 6.8 | 7.1 | 8.5 | 10.2 | 10.9 | 9.4 | 13.1 |
| Apparent min temperature | 18.7 | 20.8 | 20.9 | 20.2 | 19.4 | 20 | 22.9 | 25.1 | 25.1 | 25 | 24.6 | 22.5 | 19.9 | 18.2 | 18.9 | 20.5 | 22.8 | 18.3 | 16.6 | 18.1 | 19.2 | 13.2 | 11.1 | 9.8 | 12.3 | 15.2 | 15.3 | 17.9 | 16.5 | 17.4 |
| Settembre | 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) | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13 | 13 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12 | 12 | 11.9 | 11.9 | 11.8 | 11.8 |
| Sunshine duration (h) | 11.6 | 12.3 | 11.7 | 11.8 | 12.2 | 12.1 | 12 | 11.6 | 11.6 | 11.7 | 11.2 | 11.1 | 7.4 | 11 | 7.8 | 11 | 11 | 0.3 | 10.3 | 11.1 | 9.1 | 7.4 | 7 | 10.5 | 10.8 | 10.8 | 9.8 | 10.7 | 10.6 | 5 |
| Precipitation (mm) | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13.4 | 1.2 | 0 | 0.2 | 0 | 6.6 | 0.9 | 0 | 14.5 | 30.5 | 3.7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation hours | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 8 | 0 | 1 | 0 | 11 | 5 | 0 | 7 | 19 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 11.8 | 9.4 | 12.2 | 12.3 | 8.5 | 7.6 | 5.8 | 7.4 | 7.5 | 7.2 | 7.7 | 12.6 | 12.5 | 12.3 | 5.4 | 6.9 | 8.7 | 10.2 | 12.7 | 7.2 | 12.7 | 9.4 | 10.7 | 17.3 | 6.4 | 3.8 | 9 | 4.7 | 15.9 | 6.4 |
In September 2023, the highest daytime temperature in Affoltern Am Albis was 28.8°C.
While the minimum temperature at night dropped to 6.8°C.
The average nighttime and daytime temperatures during September in Affoltern Am Albis are 13°C and 23.3°C respectively.
The precipitation sum in September is about 71 mm.