Average temperature in September is 18.1 °C
Average daytime temperature is 22.8 °C
Average night temperature is 13.9 °C
Absolute maximum temperature: 31.9 °C
Absolute minimum temperature: 8.9 °C
Number of sunny days: 17
Number of rainy days: 13
Number of snow days:
Precipitation sum: 121 mm
* Weather data for Helfenstein United States 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 | 23.8 | 26.1 | 30.4 | 31.9 | 31.3 | 31.2 | 30.7 | 27.9 | 26.5 | 24.9 | 25.6 | 25.7 | 23.8 | 21 | 21.1 | 22.1 | 18 | 20.8 | 20.7 | 21.6 | 21 | 20.5 | 15.3 | 15.2 | 16.9 | 14.7 | 17 | 17 | 19.1 | 22 |
| Apparent max temperature | 25.4 | 27.4 | 32.5 | 34.4 | 35 | 34.1 | 33.6 | 31.5 | 29.7 | 27.3 | 28.3 | 27.6 | 25.5 | 20.3 | 19.4 | 21.6 | 17 | 19.6 | 18.3 | 20.3 | 20.4 | 18.1 | 13.2 | 14.4 | 16.8 | 13.3 | 15.2 | 16 | 20.1 | 21.3 |
| Mean temperature | 17.1 | 18.8 | 23.4 | 25.1 | 25.4 | 26 | 24.9 | 22.8 | 21.8 | 21.1 | 20.8 | 20.2 | 20.1 | 16.8 | 15.1 | 15.4 | 14.8 | 16.9 | 15.3 | 15.6 | 15.5 | 15.5 | 13.2 | 14.1 | 15.1 | 13.3 | 13.2 | 13.1 | 15.6 | 16.3 |
| Apparent mean temperature | 9.8 | 11.4 | 19 | 21.8 | 20.3 | 22.6 | 22.9 | 21.3 | 21.3 | 20.6 | 19.7 | 16.3 | 17.5 | 11 | 7.7 | 6.8 | 10 | 13.4 | 9.3 | 8.7 | 7.8 | 9.3 | 9.6 | 10.9 | 12.7 | 10.2 | 6.7 | 6.9 | 12 | 10.9 |
| Minimum temperature | 11.4 | 12.7 | 18.2 | 19.8 | 18.9 | 19.9 | 21.3 | 18.9 | 18.7 | 18.5 | 17.6 | 15.4 | 16.6 | 11.6 | 9.8 | 9.4 | 11 | 13.6 | 10.8 | 10.3 | 9.9 | 11.4 | 11.5 | 13.1 | 14 | 11.6 | 9.7 | 8.9 | 12.7 | 11.3 |
| Apparent min temperature | 16.6 | 18.4 | 24.7 | 27.2 | 28 | 29 | 27.4 | 25.7 | 24.6 | 23.4 | 23.3 | 21.9 | 20.8 | 15.9 | 12.9 | 13.9 | 14.1 | 17 | 13.3 | 14.4 | 14.1 | 13.6 | 11.1 | 12.4 | 14.7 | 11.8 | 11.4 | 11.4 | 15.4 | 16 |
| 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) | 13.1 | 13.1 | 13 | 13 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12 | 12 | 12 | 11.9 | 11.9 | 11.8 |
| Sunshine duration (h) | 12.1 | 12 | 12 | 9.4 | 11.9 | 11.9 | 9.9 | 11.9 | 9.5 | 9.5 | 10.7 | 11.7 | 10.7 | 11.6 | 11.6 | 11.6 | 2.4 | 8.4 | 11.3 | 10.9 | 11.3 | 10.6 | 0 | 0 | 0 | 0 | 8.4 | 9.3 | 3 | 9.6 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 0 | 0.8 | 2.6 | 22.2 | 8.6 | 2.3 | 0 | 2.6 | 0 | 0 | 0 | 9.2 | 6 | 0 | 0 | 0 | 0 | 10.2 | 40.9 | 9.2 | 3.7 | 0 | 0 | 2.4 | 0 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 | 11 | 6 | 13 | 0 | 9 | 0 | 0 | 0 | 8 | 11 | 0 | 0 | 0 | 0 | 10 | 18 | 18 | 11 | 0 | 0 | 8 | 0 |
| Wind speed (m/s) | 11.5 | 11 | 13.8 | 14.8 | 15.8 | 10.6 | 14.7 | 12.5 | 10 | 11.6 | 11.1 | 7.7 | 17.4 | 13.5 | 15.8 | 14.3 | 16.1 | 17.1 | 16.2 | 11.3 | 12.2 | 17.1 | 19.4 | 23.1 | 15.9 | 13.8 | 11.9 | 13.7 | 12.6 | 16.6 |
In September 2023, the highest daytime temperature in Helfenstein was 31.9°C.
While the minimum temperature at night dropped to 8.9°C.
The average nighttime and daytime temperatures during September in Helfenstein are 13.9°C and 22.8°C respectively.
The precipitation sum in September is about 121 mm.