Average temperature in September is 18.6 °C
Average daytime temperature is 24.4 °C
Average night temperature is 13.9 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: 8.5 °C
Number of sunny days: 11
Number of rainy days: 19
Number of snow days:
Precipitation sum: 42 mm
* Weather data for Bryn Mawr 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 | 26.6 | 30.4 | 32 | 32.7 | 33.1 | 33.2 | 28.5 | 26.1 | 24.6 | 24.4 | 26.3 | 25.5 | 21.7 | 21.4 | 21.6 | 23.8 | 21 | 21.2 | 20.3 | 23.2 | 24.9 | 22.9 | 17.7 | 17.4 | 20.8 | 19 | 23.2 | 23.1 | 23.3 | 22.7 |
| Apparent max temperature | 27.2 | 31.7 | 33 | 34.7 | 35.4 | 33.9 | 30.9 | 29.6 | 25.8 | 25.7 | 27.4 | 27.1 | 21.6 | 19.6 | 20.7 | 24 | 21.6 | 20.1 | 19.3 | 23.4 | 24.6 | 21.5 | 15.3 | 17.7 | 21.6 | 18.9 | 22.4 | 22.8 | 24.5 | 22.9 |
| Mean temperature | 18.6 | 21.4 | 24.8 | 25.9 | 25.7 | 26.1 | 23.5 | 20.9 | 19.6 | 20.1 | 20.2 | 19.9 | 18 | 15.5 | 14.7 | 15.7 | 15.5 | 16.1 | 15 | 16.1 | 17.8 | 17.5 | 14.5 | 14.3 | 16.8 | 16.2 | 17.1 | 16.7 | 16.4 | 17 |
| Apparent mean temperature | 10.4 | 13.7 | 19.9 | 22.1 | 21.1 | 21.7 | 22.6 | 18.7 | 16 | 17.6 | 16.4 | 15.8 | 15.2 | 9.8 | 6.7 | 8.2 | 10.2 | 11.3 | 8.6 | 8.9 | 11.1 | 10.8 | 9.8 | 10.8 | 15.4 | 13.2 | 12.1 | 10.5 | 10.9 | 12.5 |
| Minimum temperature | 11.7 | 14.4 | 18.8 | 20.4 | 18.8 | 20 | 19.7 | 17.2 | 15.5 | 16.7 | 15.7 | 15.6 | 14.9 | 10.6 | 8.5 | 9.2 | 11.5 | 11.9 | 10 | 9.9 | 11.9 | 12.2 | 12 | 12.3 | 14.6 | 14.1 | 13.2 | 11.8 | 11.6 | 12.5 |
| Apparent min temperature | 18.1 | 21.7 | 26 | 28 | 28 | 27.9 | 25.7 | 23.1 | 20.8 | 21.7 | 21.4 | 20.9 | 18.5 | 14.5 | 13.2 | 15.3 | 15.4 | 15.5 | 14 | 15.3 | 17.5 | 16.3 | 12.2 | 13.4 | 17.8 | 15.5 | 16 | 15.8 | 16.6 | 17.5 |
| 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 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 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) | 12.2 | 12.2 | 11.9 | 11.7 | 11.9 | 11.8 | 7.8 | 7.7 | 4 | 6.3 | 10.9 | 8.5 | 11.6 | 11.6 | 11.5 | 11.5 | 6.4 | 10.4 | 8 | 10.5 | 11.3 | 11.2 | 4.2 | 1 | 1.5 | 1.2 | 10.2 | 7 | 10.7 | 7.7 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 0.1 | 3.2 | 1.6 | 2 | 7.7 | 0.4 | 3.3 | 2.5 | 0.1 | 0 | 0 | 6.2 | 2.5 | 0 | 0 | 0 | 0 | 1.2 | 6 | 1.2 | 0.5 | 1.6 | 0.3 | 0.9 | 0.6 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 1 | 16 | 9 | 8 | 14 | 3 | 6 | 8 | 1 | 0 | 0 | 10 | 3 | 0 | 0 | 0 | 0 | 6 | 21 | 6 | 3 | 3 | 2 | 6 | 3 |
| Wind speed (m/s) | 10.7 | 11.4 | 16.6 | 10.9 | 9.6 | 15.9 | 15.3 | 10.6 | 12.5 | 10 | 12.1 | 11.5 | 10.4 | 12 | 13 | 8.6 | 9.2 | 14.3 | 11 | 8.9 | 9.9 | 13.8 | 16.8 | 17.7 | 8 | 15.5 | 14.8 | 13.5 | 12.5 | 9.2 |
In September 2023, the highest daytime temperature in Bryn Mawr was 33.2°C.
While the minimum temperature at night dropped to 8.5°C.
The average nighttime and daytime temperatures during September in Bryn Mawr are 13.9°C and 24.4°C respectively.
The precipitation sum in September is about 42 mm.