Average temperature in September is 18.5 °C
Average daytime temperature is 23.7 °C
Average night temperature is 13.6 °C
Absolute maximum temperature: 28.9 °C
Absolute minimum temperature: 7 °C
Number of sunny days: 23
Number of rainy days: 7
Number of snow days:
Precipitation sum: 70 mm
* Weather data for Zürich Switzerland 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 | 24.2 | 26 | 25.3 | 26 | 26 | 26.3 | 27.3 | 28.3 | 28.7 | 28.9 | 28.8 | 26.7 | 22.1 | 21.4 | 22.2 | 26.4 | 27.5 | 20.6 | 21.1 | 22.6 | 23.6 | 17.4 | 15.3 | 17.8 | 18.6 | 20.5 | 20.9 | 23.9 | 24.9 | 21.1 |
| Apparent max temperature | 24.8 | 27.5 | 27.1 | 26.8 | 28.5 | 28.8 | 30.1 | 31.5 | 32 | 31.5 | 31.7 | 28.7 | 23.7 | 21.4 | 24 | 27.7 | 29.2 | 22.5 | 21 | 23.7 | 25 | 16.9 | 14.1 | 15.5 | 18.6 | 21.1 | 21.8 | 24.9 | 25.3 | 21.4 |
| Mean temperature | 19.1 | 19.8 | 20.1 | 20 | 18.9 | 19 | 20.9 | 22.5 | 22.9 | 23.1 | 22.7 | 21.4 | 19.5 | 18.1 | 18.1 | 19.2 | 21.5 | 18.4 | 17.5 | 17.9 | 18.7 | 14.4 | 12.7 | 12.4 | 13.1 | 15.3 | 15.5 | 18.2 | 18 | 17.4 |
| Apparent mean temperature | 13.4 | 14.8 | 14.9 | 15.1 | 12.5 | 12.2 | 14.8 | 18.9 | 18.7 | 19.5 | 17.7 | 17.5 | 18.7 | 16.1 | 14.7 | 15.3 | 17.5 | 16.5 | 14.3 | 11.4 | 15.2 | 11.2 | 9.6 | 6 | 5.5 | 10.3 | 9.6 | 12 | 10.8 | 13.5 |
| Minimum temperature | 13.7 | 14.3 | 14.4 | 14.5 | 12.7 | 12.2 | 14 | 17.1 | 16.9 | 17.6 | 16.2 | 16.3 | 17.1 | 15.3 | 14.2 | 14.1 | 16.9 | 16.2 | 14.2 | 11.8 | 14.5 | 12.3 | 11.1 | 7.4 | 7 | 10.5 | 10.1 | 12 | 11.3 | 13.6 |
| Apparent min temperature | 19.6 | 21.3 | 21.6 | 20.6 | 19.9 | 20.3 | 23.1 | 25.5 | 26 | 26 | 25.4 | 23.3 | 21 | 18.7 | 19.4 | 20.6 | 23.6 | 19.7 | 17.3 | 18.8 | 19.9 | 14 | 11.7 | 10.7 | 12.8 | 15.9 | 15.9 | 19.2 | 18.5 | 17.8 |
| 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) | 13.4 | 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 | 11.5 | 12 | 12.2 | 12.1 | 11.9 | 11.8 | 11.7 | 11.6 | 11.3 | 11.3 | 7.6 | 11.1 | 7.9 | 11 | 11 | 1.4 | 9.7 | 11.1 | 9.1 | 7.5 | 6.9 | 10.8 | 10.8 | 10 | 10.7 | 10.5 | 10.6 | 5.5 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13.4 | 0.7 | 0 | 0 | 0 | 10.7 | 1.6 | 0 | 14.2 | 27.1 | 2.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 5 | 0 | 0 | 0 | 9 | 7 | 0 | 5 | 18 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 12.4 | 8.5 | 11.8 | 13.4 | 9.1 | 7.9 | 6.7 | 7.9 | 6.7 | 7.7 | 7.2 | 9.7 | 10.8 | 12.2 | 6.5 | 8.9 | 7.8 | 12.4 | 11.7 | 7.6 | 16.7 | 10.5 | 11.4 | 16.9 | 7.6 | 4.3 | 10 | 5.5 | 16.8 | 7.2 |
In September 2023, the highest daytime temperature in Zürich was 28.9°C.
While the minimum temperature at night dropped to 7°C.
The average nighttime and daytime temperatures during September in Zürich are 13.6°C and 23.7°C respectively.
The precipitation sum in September is about 70 mm.