Average temperature in September is 23.6 °C
Average daytime temperature is 28.5 °C
Average night temperature is 20.2 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: 11.8 °C
Number of sunny days: 7
Number of rainy days: 23
Number of snow days:
Precipitation sum: 170 mm
* Weather data for Nagai 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 | 36.3 | 33 | 33.6 | 30.1 | 30.3 | 26.5 | 28.3 | 23.9 | 30.9 | 31.8 | 31.7 | 32.5 | 30.5 | 31.3 | 29 | 30.2 | 32.5 | 31.7 | 29.8 | 29.1 | 25.7 | 24 | 22.6 | 24 | 25.2 | 24.8 | 22.9 | 24.7 | 24.2 | 23.7 |
| Apparent max temperature | 38.2 | 35.8 | 37.7 | 33.8 | 35.7 | 31.8 | 32.3 | 28.6 | 35.9 | 37.3 | 35.4 | 37.3 | 35.1 | 35 | 33 | 34 | 37.3 | 35.5 | 32.4 | 31 | 28.6 | 26.3 | 22.5 | 23.8 | 25.2 | 25.5 | 26.1 | 26.9 | 25.6 | 26.4 |
| Mean temperature | 28.9 | 27 | 27.3 | 25.8 | 25.2 | 22.5 | 23.4 | 21.8 | 25.9 | 26.2 | 27 | 24.8 | 24.8 | 26 | 24.6 | 25.3 | 26.2 | 26.2 | 24.6 | 23.2 | 22.4 | 19.7 | 18.2 | 17.7 | 20.4 | 21 | 20.4 | 20.9 | 19.7 | 19.7 |
| Apparent mean temperature | 25.2 | 25.7 | 26.6 | 28.4 | 28.4 | 23.9 | 22.7 | 23.4 | 25.6 | 27.5 | 27.3 | 25.6 | 24.7 | 26.2 | 26.1 | 26 | 26.9 | 25.2 | 24.1 | 23.9 | 22.5 | 16.9 | 13.3 | 11.5 | 17.1 | 21.7 | 21.8 | 19.8 | 16.6 | 18.7 |
| Minimum temperature | 22.8 | 21.8 | 22.9 | 23.5 | 23.3 | 20.7 | 19.8 | 21 | 21.9 | 23 | 23 | 21.4 | 21.2 | 22.4 | 21.9 | 21.9 | 22.6 | 21.9 | 21.5 | 20.5 | 19.6 | 16 | 13.4 | 11.8 | 15.8 | 18.9 | 19.3 | 18.1 | 16.3 | 17.7 |
| Apparent min temperature | 30.8 | 30.4 | 31.1 | 30.7 | 30.5 | 26.8 | 26.5 | 25 | 30.6 | 31.2 | 30.9 | 29.6 | 29 | 29.3 | 28.8 | 29.5 | 31.1 | 30 | 27.4 | 26.2 | 25.5 | 21.8 | 18.3 | 18 | 21.7 | 23.1 | 23.5 | 23.4 | 20.7 | 21.7 |
| 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 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 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) | 11 | 8.9 | 11.7 | 4.9 | 5.7 | 2.5 | 8.4 | 2 | 10.3 | 8.7 | 11.4 | 8.6 | 11.1 | 7.9 | 9.6 | 11.1 | 10.4 | 11 | 10 | 6 | 0.4 | 7 | 10.1 | 11 | 7.8 | 3.2 | 4 | 7.9 | 9.5 | 2.1 |
| Precipitation (mm) | 0 | 0 | 0.2 | 32.6 | 32.5 | 22 | 0 | 9 | 1.7 | 0.6 | 0 | 6.4 | 1.6 | 4.2 | 2 | 1.2 | 1 | 1 | 0.4 | 2.2 | 5.1 | 0.9 | 0 | 0 | 0 | 7.5 | 23.3 | 3.6 | 0.5 | 10.3 |
| Precipitation hours | 0 | 0 | 1 | 18 | 13 | 12 | 0 | 11 | 4 | 4 | 0 | 7 | 2 | 5 | 10 | 7 | 3 | 6 | 2 | 9 | 13 | 7 | 0 | 0 | 0 | 10 | 18 | 12 | 4 | 14 |
| Wind speed (m/s) | 11.2 | 9 | 9.5 | 8.8 | 6.6 | 7.4 | 7.4 | 13 | 10.5 | 6.1 | 12.4 | 9.7 | 8.1 | 11.3 | 6.5 | 10.5 | 8.2 | 12.1 | 16.3 | 13 | 13.1 | 7.4 | 6.4 | 10 | 12.3 | 7.5 | 8.3 | 18.7 | 11.6 | 10.5 |
In September 2023, the highest daytime temperature in Nagai was 36.3°C.
While the minimum temperature at night dropped to 11.8°C.
The average nighttime and daytime temperatures during September in Nagai are 20.2°C and 28.5°C respectively.
The precipitation sum in September is about 170 mm.