Average temperature in September is 29.1 °C
Average daytime temperature is 35.1 °C
Average night temperature is 24.5 °C
Absolute maximum temperature: 40.2 °C
Absolute minimum temperature: 21.7 °C
Number of sunny days: 9
Number of rainy days: 21
Number of snow days:
Precipitation sum: 59 mm
* Weather data for Richmond 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 | 37.3 | 36.6 | 35.6 | 35.5 | 37.5 | 38.2 | 38.8 | 40.2 | 38.2 | 35.3 | 34.8 | 36.1 | 33.6 | 31.6 | 32 | 31.1 | 32.2 | 33.5 | 34.2 | 35.6 | 36.3 | 36.9 | 36.5 | 37.8 | 33.4 | 32.4 | 32.8 | 32.7 | 33 | 34.6 |
| Apparent max temperature | 38.5 | 39.3 | 40.6 | 38.2 | 40.5 | 41.9 | 44.2 | 44.1 | 39.9 | 36.7 | 37.7 | 39.8 | 37.1 | 38.1 | 39 | 36.6 | 35.7 | 35.1 | 35 | 38.7 | 40.3 | 39.6 | 40.8 | 41.5 | 37.3 | 37.2 | 36.8 | 36.9 | 36.2 | 36.2 |
| Mean temperature | 30.8 | 30.4 | 30.7 | 29.9 | 31.4 | 31.4 | 31.9 | 32.2 | 31.1 | 29.1 | 28.5 | 29.9 | 29.9 | 26.4 | 26.3 | 26.2 | 27.1 | 27.7 | 27.7 | 28.8 | 29.7 | 30.1 | 29.9 | 30.4 | 28.5 | 27.4 | 26.9 | 27 | 27.4 | 28.6 |
| Apparent mean temperature | 27.2 | 29.2 | 31.4 | 25.3 | 31.8 | 33.2 | 32.5 | 32.8 | 27.9 | 26 | 23.7 | 27.4 | 30.1 | 28.1 | 26.1 | 27.8 | 26.4 | 25.1 | 23.5 | 26.6 | 29.9 | 30.1 | 30.8 | 30.4 | 30.6 | 28.9 | 26.9 | 28.3 | 27.9 | 28.2 |
| Minimum temperature | 24.6 | 25.3 | 26.1 | 22.9 | 27.3 | 26.7 | 27 | 27.2 | 25.2 | 25.4 | 22.7 | 24.3 | 25.9 | 23.9 | 23.1 | 23.1 | 22.4 | 21.7 | 22 | 23.3 | 24.9 | 24.9 | 25.5 | 25.9 | 25.8 | 23.9 | 22.5 | 23.3 | 23.6 | 23.6 |
| Apparent min temperature | 32.4 | 33.7 | 34.6 | 33.6 | 35.2 | 36.4 | 36.4 | 36.4 | 34.6 | 31.4 | 30.3 | 32.7 | 33 | 31.4 | 31.1 | 30.8 | 30.4 | 30.1 | 28.7 | 31.1 | 33.7 | 33.9 | 34.2 | 34.5 | 32.9 | 32.2 | 31.2 | 31.7 | 31.2 | 31.6 |
| 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) | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12 | 12 | 12 | 11.9 | 11.9 |
| Sunshine duration (h) | 11.8 | 11.6 | 11.7 | 11.6 | 11.6 | 11.1 | 11.6 | 11.3 | 11.3 | 11.4 | 11.5 | 11 | 11.1 | 7 | 11 | 10 | 10.6 | 11.3 | 11.4 | 11.4 | 11.3 | 11.3 | 11.2 | 9.9 | 5.4 | 10.5 | 10.9 | 9 | 11 | 10.9 |
| Precipitation (mm) | 0 | 1.7 | 0.6 | 0.6 | 0.4 | 0.7 | 0.1 | 0 | 1.2 | 2.1 | 0 | 0 | 0.1 | 37.1 | 3.6 | 2.1 | 0.6 | 0 | 0 | 0 | 0.3 | 0 | 1 | 0 | 2.8 | 2.1 | 0.2 | 0.6 | 0.8 | 0.2 |
| Precipitation hours | 0 | 6 | 3 | 3 | 1 | 3 | 1 | 0 | 3 | 3 | 0 | 0 | 1 | 13 | 7 | 6 | 5 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 3 | 4 | 2 | 3 | 3 | 1 |
| Wind speed (m/s) | 16.2 | 17.1 | 16.6 | 19.1 | 19.2 | 20.1 | 24.8 | 21.3 | 25.7 | 14 | 11.6 | 15.2 | 14.1 | 11.6 | 14.7 | 14.8 | 12.7 | 11.3 | 17.7 | 19.4 | 17.3 | 14.9 | 16.5 | 18.9 | 22.1 | 13.7 | 9.4 | 13.7 | 21.5 | 23.1 |
In September 2023, the highest daytime temperature in Richmond was 40.2°C.
While the minimum temperature at night dropped to 21.7°C.
The average nighttime and daytime temperatures during September in Richmond are 24.5°C and 35.1°C respectively.
The precipitation sum in September is about 59 mm.