Average temperature in September is 21.1 °C
Average daytime temperature is 28 °C
Average night temperature is 15.5 °C
Absolute maximum temperature: 35 °C
Absolute minimum temperature: 10.7 °C
Number of sunny days: 16
Number of rainy days: 14
Number of snow days:
Precipitation sum: 80 mm
* Weather data for Falmouth 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 | 30.8 | 32.3 | 33.6 | 34.1 | 35 | 32.1 | 27.5 | 28.5 | 27 | 28 | 29.4 | 25.3 | 25.1 | 25.4 | 25 | 27 | 25.7 | 23.7 | 24.9 | 28.8 | 28.9 | 29 | 26.2 | 27.5 | 26.3 | 28.5 | 26 | 25.1 | 26.3 | 26.7 |
| Apparent max temperature | 33.6 | 35.3 | 36.4 | 36 | 36.7 | 34.7 | 29 | 29.5 | 28.9 | 28.9 | 31.1 | 25.6 | 24.7 | 24.8 | 24.6 | 27.4 | 25.6 | 23 | 24.8 | 28.8 | 29.3 | 28.3 | 24.6 | 27.3 | 26.2 | 29.4 | 28.3 | 26.4 | 28 | 27.4 |
| Mean temperature | 21.4 | 24.6 | 26.4 | 26.3 | 26.9 | 26 | 22.9 | 22.4 | 21.7 | 21.7 | 22 | 21.1 | 19 | 18.4 | 18.4 | 18.7 | 19.5 | 17.6 | 17.8 | 19.8 | 21.2 | 21.9 | 19.5 | 19.9 | 19.8 | 20 | 19 | 19.7 | 19.6 | 19.7 |
| Apparent mean temperature | 13.1 | 18.5 | 22.1 | 20.6 | 22.9 | 24.6 | 20.5 | 18.7 | 18.5 | 16.9 | 16.2 | 18.7 | 13.9 | 11.3 | 11.1 | 10.8 | 14.7 | 12.3 | 9.7 | 11 | 14.5 | 15.9 | 11.6 | 12.9 | 16.1 | 13.6 | 16.9 | 17.5 | 16.4 | 15.1 |
| Minimum temperature | 13.9 | 17.5 | 19.8 | 19.4 | 21 | 21.9 | 18.7 | 17.8 | 17.4 | 16.6 | 15.4 | 18.1 | 14.1 | 12.4 | 12.5 | 11.8 | 14.3 | 12.7 | 10.7 | 12.3 | 14.7 | 15.7 | 12.9 | 14.1 | 15.1 | 13.7 | 16.1 | 16.2 | 15 | 14.3 |
| Apparent min temperature | 22 | 26.5 | 29 | 28.2 | 28.6 | 28.9 | 25.1 | 23.9 | 23 | 22.3 | 23.2 | 22 | 19.2 | 17.6 | 17.2 | 18.2 | 20 | 17.5 | 17 | 18.9 | 21 | 22 | 18 | 19 | 20.4 | 20.4 | 20.6 | 21.2 | 21.1 | 20.8 |
| 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 | 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 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12 | 12 | 11.9 | 11.9 | 11.8 |
| Sunshine duration (h) | 12.2 | 12 | 12 | 12 | 11.6 | 8.5 | 9.7 | 10.6 | 11.4 | 11 | 11.4 | 3.7 | 11.1 | 11.4 | 11.3 | 11.3 | 11.1 | 11.1 | 11.1 | 11.1 | 10.3 | 11 | 11 | 9.7 | 7.5 | 11 | 10.6 | 9.4 | 9.7 | 10.3 |
| Precipitation (mm) | 0 | 0.3 | 0 | 0 | 0.4 | 8.7 | 2.7 | 0 | 0.3 | 0.3 | 0 | 0.2 | 0.2 | 0 | 0 | 0 | 13.7 | 0.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.9 | 46.4 | 4.6 | 0.1 | 0 |
| Precipitation hours | 0 | 3 | 0 | 0 | 1 | 3 | 11 | 0 | 3 | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 7 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 17 | 7 | 1 | 0 |
| Wind speed (m/s) | 10.6 | 11.4 | 9.2 | 9.1 | 12.7 | 16.7 | 11.5 | 13.9 | 11.5 | 11.5 | 9.7 | 11.6 | 13.1 | 8.7 | 11.4 | 9.2 | 10.1 | 12.1 | 10.4 | 10.4 | 10.2 | 10.7 | 11.8 | 14.2 | 11.4 | 12.1 | 12.5 | 15.3 | 9 | 9.2 |
In September 2023, the highest daytime temperature in Falmouth was 35°C.
While the minimum temperature at night dropped to 10.7°C.
The average nighttime and daytime temperatures during September in Falmouth are 15.5°C and 28°C respectively.
The precipitation sum in September is about 80 mm.