Average temperature in September is 17.3 °C
Average daytime temperature is 24.7 °C
Average night temperature is 10.8 °C
Absolute maximum temperature: 31.8 °C
Absolute minimum temperature: 5.4 °C
Number of sunny days: 19
Number of rainy days: 11
Number of snow days:
Precipitation sum: 14 mm
* Weather data for Cheyenne 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 | 31.8 | 30.5 | 28.3 | 27.8 | 21 | 27.1 | 27.7 | 27 | 26.6 | 23 | 18.6 | 22 | 23.7 | 22 | 17.4 | 22.9 | 26.5 | 25.9 | 24.4 | 23 | 23.2 | 21.8 | 21 | 22.5 | 24.7 | 25.7 | 27.4 | 25.4 | 25.2 | 26.7 |
| Apparent max temperature | 28.8 | 30.1 | 26.5 | 24.4 | 15.7 | 23.1 | 23.9 | 23.7 | 22.7 | 18.7 | 16.4 | 20.9 | 21.4 | 17.4 | 14.8 | 20.1 | 22.9 | 20.2 | 21 | 18.7 | 21.5 | 17.8 | 17.2 | 17.4 | 22.1 | 22 | 24.9 | 21.7 | 20.9 | 21.5 |
| Mean temperature | 23.6 | 23.8 | 22.4 | 20.2 | 16.1 | 16.7 | 20 | 19.6 | 19.5 | 15.3 | 13.3 | 14.6 | 16.2 | 14.4 | 12.4 | 13.7 | 16.8 | 19.2 | 19.1 | 17.2 | 15.8 | 15 | 13.6 | 14.1 | 15.6 | 17 | 18.6 | 19 | 17.3 | 18 |
| Apparent mean temperature | 12.2 | 13.8 | 14.4 | 12 | 6.8 | 5.8 | 9.3 | 8.8 | 8.4 | 11.6 | 8.1 | 6.5 | 6.3 | 7.7 | 6.5 | 2 | 4.6 | 8.8 | 8.5 | 8.2 | 6.6 | 7.3 | -2.1 | 3.7 | 1.6 | 4.1 | 6.7 | 8.2 | 5.4 | 7.8 |
| Minimum temperature | 15.5 | 17.3 | 16 | 13.7 | 11.5 | 9.8 | 12.9 | 12.2 | 12.3 | 12.4 | 9.8 | 8.9 | 8.7 | 10.4 | 8.7 | 5.4 | 8.1 | 13.9 | 14 | 11.6 | 9.4 | 9 | 8 | 8.3 | 6.2 | 7.4 | 10.4 | 12 | 9 | 9.9 |
| Apparent min temperature | 19.8 | 21.1 | 20 | 18.2 | 10.8 | 13.2 | 16.2 | 15.9 | 15.1 | 13.5 | 11.7 | 12.4 | 13.6 | 11 | 10.1 | 10.6 | 13 | 14.4 | 14 | 13.2 | 13.1 | 12.6 | 7 | 9.3 | 11.8 | 13.3 | 15 | 14.9 | 13.6 | 14.3 |
| 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) | 13.1 | 13.1 | 13 | 13 | 12.9 | 12.9 | 12.9 | 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 | 12 | 10.9 | 10.9 | 12 | 12 | 12 | 11.9 | 11.9 | 6.7 | 10.9 | 11.8 | 11.7 | 8.3 | 9.6 | 11.6 | 11.5 | 11.5 | 9.7 | 10.6 | 10.4 | 11.3 | 11.3 | 11.2 | 11.2 | 11.1 | 11.1 | 11 | 10.9 | 10.9 |
| Precipitation (mm) | 0 | 0 | 0.1 | 1.7 | 0 | 0 | 0 | 0 | 0 | 2.8 | 0.3 | 0 | 0 | 1.9 | 4.2 | 0 | 0 | 0 | 0.1 | 0.2 | 0.4 | 0.3 | 2.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation hours | 0 | 0 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 8 | 3 | 0 | 0 | 6 | 9 | 0 | 0 | 0 | 1 | 1 | 2 | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 22.1 | 21 | 25 | 35.3 | 42.8 | 25.2 | 27.1 | 23.9 | 22.7 | 23.1 | 11.3 | 15.6 | 15.7 | 28.5 | 16.9 | 14.4 | 20.5 | 26 | 30.9 | 21.7 | 12.9 | 28 | 50.2 | 28.3 | 16.6 | 14.7 | 21.6 | 20.5 | 25 | 27.3 |
In September 2023, the highest daytime temperature in Cheyenne was 31.8°C.
While the minimum temperature at night dropped to 5.4°C.
The average nighttime and daytime temperatures during September in Cheyenne are 10.8°C and 24.7°C respectively.
The precipitation sum in September is about 14 mm.