Average temperature in September is 25.6 °C
Average daytime temperature is 29.2 °C
Average night temperature is 22.5 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 7
Number of rainy days: 23
Number of snow days:
Precipitation sum: 138 mm
* Weather data for Nankoku Japan 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 | 29 | 29.9 | 31.2 | 34.2 | 29.1 | 29 | 31.2 | 30.7 | 28.8 | 28 | 26.8 | 28.1 | 28.6 | 28.7 | 30 | 29.5 | 29.3 | 29.4 | 29.2 | 28.7 | 29.9 | 28.5 | 28.9 | 28.2 | 27.7 | 28.8 | 28.5 | 29.5 | 29 | 27.6 |
| Apparent max temperature | 35.6 | 35.1 | 37.4 | 37.5 | 34.4 | 35.4 | 33.1 | 36.1 | 33.9 | 35.2 | 31.2 | 34.6 | 33.5 | 34.5 | 36 | 35.1 | 35.3 | 35.2 | 34.6 | 34.1 | 34 | 32.2 | 33.1 | 31.1 | 29.7 | 31.9 | 33.6 | 34.5 | 32.2 | 31.8 |
| Mean temperature | 25.6 | 26.5 | 27 | 29.2 | 25.6 | 26.9 | 27.2 | 25.8 | 25.2 | 23.6 | 23.7 | 24.8 | 25.7 | 25.8 | 26.7 | 26.5 | 26.3 | 25.7 | 25.7 | 25.7 | 25.9 | 24.7 | 23.8 | 24.5 | 24.3 | 24.4 | 25.3 | 25.6 | 24.9 | 24.7 |
| Apparent mean temperature | 28.4 | 27.1 | 26.7 | 30.5 | 27.2 | 25.7 | 25.9 | 24.5 | 27.2 | 24.2 | 25.3 | 26.3 | 27.5 | 27.2 | 27.4 | 28.9 | 27.8 | 25.7 | 26.9 | 28.6 | 26.5 | 23.4 | 18.2 | 25.8 | 22.6 | 22.5 | 25.4 | 25.1 | 24.5 | 26.8 |
| Minimum temperature | 23.5 | 22.9 | 23.4 | 24.8 | 22.8 | 24.6 | 24.3 | 21.9 | 22.7 | 21.2 | 21.4 | 22.3 | 23.4 | 22.9 | 23 | 24.1 | 23.2 | 22.1 | 22.8 | 23.8 | 22.9 | 20.8 | 18.7 | 22.7 | 20.5 | 20 | 21.8 | 22.4 | 21.3 | 22.3 |
| Apparent min temperature | 30.8 | 31.7 | 31.8 | 33.3 | 30.3 | 30.8 | 29.2 | 29.7 | 30.2 | 28.2 | 28.1 | 29.6 | 30.6 | 31.3 | 32 | 31.9 | 31.3 | 30.7 | 30.6 | 30.7 | 30.9 | 29 | 24.7 | 27.6 | 27.1 | 27.5 | 29.7 | 29.3 | 28.6 | 29.2 |
| 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) | 12.9 | 12.8 | 12.8 | 12.8 | 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) | 6.8 | 9.3 | 11.9 | 11.9 | 10.2 | 11.3 | 11.9 | 11.8 | 9.1 | 2.3 | 10.2 | 10.8 | 9.5 | 5.2 | 11.5 | 10.7 | 9.8 | 11.3 | 10.8 | 8.9 | 8.9 | 5 | 9.9 | 7.7 | 6.5 | 11.2 | 11 | 11 | 10.8 | 10.5 |
| Precipitation (mm) | 4.4 | 0 | 0 | 2.9 | 6 | 0.8 | 0 | 1 | 4.5 | 48.1 | 12.3 | 2.7 | 2.6 | 2.4 | 0 | 1.5 | 7.9 | 1.2 | 1.5 | 9.2 | 12.2 | 8.4 | 0 | 0.1 | 0.2 | 0 | 0 | 0.1 | 0.9 | 7.1 |
| Precipitation hours | 19 | 0 | 0 | 5 | 18 | 6 | 0 | 4 | 9 | 23 | 16 | 8 | 16 | 5 | 0 | 6 | 10 | 8 | 6 | 17 | 11 | 8 | 0 | 1 | 2 | 0 | 0 | 1 | 3 | 13 |
| Wind speed (m/s) | 12.9 | 7.9 | 10.4 | 17.2 | 13.9 | 19 | 21.2 | 11 | 9.2 | 12.3 | 11.7 | 10 | 10.2 | 6.4 | 9.4 | 9.7 | 9.3 | 9.4 | 10.5 | 9.8 | 21.6 | 8.3 | 16.3 | 12.3 | 12.4 | 8.9 | 8.4 | 13.2 | 11.8 | 10.9 |
In September 2023, the highest daytime temperature in Nankoku was 34.2°C.
While the minimum temperature at night dropped to 18.7°C.
The average nighttime and daytime temperatures during September in Nankoku are 22.5°C and 29.2°C respectively.
The precipitation sum in September is about 138 mm.