Average temperature in September is 25.4 °C
Average daytime temperature is 31.7 °C
Average night temperature is 20.1 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: 16.2 °C
Number of sunny days: 19
Number of rainy days: 11
Number of snow days:
Precipitation sum: 13 mm
* Weather data for Union United States 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 | 32.3 | 29.9 | 32 | 33.2 | 32.2 | 33.3 | 34.4 | 31.5 | 31.5 | 31.8 | 34.3 | 34.5 | 30.2 | 27.4 | 30.6 | 31.4 | 31 | 30 | 31.3 | 31.5 | 32.1 | 31.7 | 32.4 | 34.4 | 31.2 | 31.3 | 31.2 | 29.8 | 31.6 | 32 |
| Apparent max temperature | 34.8 | 33.9 | 36.9 | 36.7 | 34.8 | 38.1 | 38.1 | 33 | 33.2 | 34.4 | 35.9 | 35.7 | 32.2 | 30.7 | 32.9 | 34 | 30.4 | 30.1 | 32.1 | 32.4 | 33.5 | 32.7 | 33.6 | 36 | 34.8 | 35.1 | 32.9 | 32.1 | 32.6 | 33.3 |
| Mean temperature | 26.3 | 25.4 | 26.3 | 27.6 | 27 | 27.6 | 28.4 | 25.6 | 24.8 | 25.3 | 26.6 | 27.3 | 25.5 | 23 | 24.4 | 25.9 | 24.8 | 23.6 | 23.2 | 24.5 | 25.3 | 25.3 | 25.6 | 26.1 | 25.3 | 24.7 | 25.1 | 23.9 | 23.5 | 24.9 |
| Apparent mean temperature | 23.4 | 26.8 | 26 | 26.8 | 25.5 | 25.2 | 27 | 19.6 | 19.3 | 19.5 | 21.4 | 23.2 | 22.6 | 21.7 | 19.1 | 23.7 | 19 | 17 | 15 | 18.1 | 20.1 | 19.6 | 21.3 | 19.2 | 23.9 | 23.5 | 22.3 | 20.4 | 18.4 | 18.9 |
| Minimum temperature | 22.2 | 22.9 | 22.2 | 22.9 | 22.6 | 22.8 | 23.1 | 19.2 | 18.8 | 19.3 | 20.4 | 21.4 | 21.2 | 20.6 | 19 | 20.3 | 19 | 17.4 | 16.2 | 18.5 | 19.4 | 19.6 | 20.1 | 19.2 | 21.5 | 20.2 | 19.9 | 18.6 | 17.5 | 18.4 |
| Apparent min temperature | 28 | 29.3 | 30.1 | 31 | 29.5 | 30.6 | 31.6 | 26.7 | 25.4 | 26.3 | 27.7 | 28.5 | 27 | 25.5 | 25.6 | 28 | 24.4 | 23.3 | 22.7 | 24.3 | 25.5 | 25.5 | 26.5 | 26.7 | 28.5 | 28.4 | 26.9 | 25.4 | 24.9 | 25.6 |
| 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) | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12 | 12 | 12 | 11.9 | 11.9 |
| Sunshine duration (h) | 10.2 | 8.4 | 11.9 | 11.9 | 11.9 | 11.9 | 11.8 | 11.6 | 11.6 | 11.8 | 11.7 | 11.7 | 7.7 | 7 | 10.7 | 11.6 | 11.5 | 11.5 | 11.5 | 11.4 | 11.1 | 11.4 | 11.1 | 10.3 | 7.5 | 10.2 | 11 | 11 | 11 | 11 |
| Precipitation (mm) | 1 | 1.7 | 0.6 | 0.1 | 0 | 1.7 | 0.7 | 0 | 0.3 | 0 | 0 | 0 | 0 | 5.7 | 0 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.9 | 0.1 | 0 | 0 | 0 | 0 |
| Precipitation hours | 5 | 4 | 6 | 1 | 0 | 2 | 3 | 0 | 3 | 0 | 0 | 0 | 0 | 7 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 1 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 14.5 | 13.2 | 11.5 | 12 | 13.4 | 13.1 | 14.5 | 11.7 | 12.4 | 13.7 | 11 | 14.2 | 14.3 | 10.6 | 9.5 | 11 | 18.4 | 11 | 11.8 | 13.2 | 14 | 14.8 | 11.5 | 10.9 | 14.8 | 5.6 | 11.5 | 13.6 | 10.1 | 10.7 |
In September 2023, the highest daytime temperature in Union was 34.5°C.
While the minimum temperature at night dropped to 16.2°C.
The average nighttime and daytime temperatures during September in Union are 20.1°C and 31.7°C respectively.
The precipitation sum in September is about 13 mm.