Average temperature in September is 26.1 °C
Average daytime temperature is 30 °C
Average night temperature is 23.2 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: 17.6 °C
Number of sunny days: 10
Number of rainy days: 20
Number of snow days:
Precipitation sum: 245 mm
* Weather data for Yachiyo Japan 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 | 34 | 34.5 | 32 | 29.6 | 31.4 | 31.2 | 29.5 | 26.9 | 29.2 | 30.7 | 30.2 | 29.7 | 31.9 | 31 | 32.1 | 32.3 | 31.7 | 31.6 | 31.3 | 31.8 | 28.5 | 28.6 | 24.3 | 24.9 | 25.4 | 28.6 | 28.9 | 30.9 | 28 | 28.4 |
| Apparent max temperature | 35.2 | 38.4 | 34.9 | 33.8 | 35.1 | 33.4 | 31.5 | 31.3 | 32.3 | 35.4 | 35.3 | 33.2 | 36.1 | 35 | 36.7 | 37.7 | 35.8 | 33.6 | 33.2 | 36.3 | 31.7 | 32.4 | 24.7 | 23.9 | 26.2 | 31 | 32.1 | 34.8 | 30.4 | 31.1 |
| Mean temperature | 29.1 | 28.7 | 27.4 | 26.7 | 28.3 | 26.3 | 25.6 | 23.8 | 26.6 | 27.1 | 26.9 | 25.3 | 26.5 | 27.5 | 27.5 | 28.1 | 28.1 | 28 | 27.5 | 26.1 | 27.1 | 24.2 | 21.7 | 20.9 | 21.7 | 23.7 | 24.5 | 26.5 | 24 | 26.2 |
| Apparent mean temperature | 29.9 | 29.3 | 27.5 | 28.8 | 30.3 | 26.9 | 23.1 | 22 | 27.9 | 28.5 | 29.1 | 25.2 | 28.1 | 30.1 | 29.8 | 31 | 29 | 28.4 | 28.3 | 26.9 | 25.7 | 23.3 | 18.6 | 16.8 | 20.2 | 23.7 | 25.8 | 26.2 | 23 | 26.5 |
| Minimum temperature | 25.6 | 24.3 | 24.1 | 25 | 25.4 | 22.9 | 22.9 | 21.8 | 24.1 | 24.2 | 24.1 | 21.4 | 23.4 | 24.6 | 24.5 | 25.1 | 25.8 | 25.4 | 23.8 | 22.9 | 25.5 | 21.6 | 20.1 | 17.6 | 18.7 | 20.4 | 21.7 | 23.6 | 20.6 | 24.6 |
| Apparent min temperature | 31.9 | 32.9 | 30.4 | 31.2 | 32 | 29.8 | 28.1 | 27.2 | 30 | 31.7 | 31.7 | 29 | 31.1 | 31.8 | 32.4 | 33.4 | 31.2 | 30.3 | 31.2 | 30.4 | 28.6 | 26.9 | 21.7 | 20.2 | 23 | 26.8 | 27.9 | 30.2 | 26.4 | 28.1 |
| 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) | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 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 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12 | 12 | 11.9 | 11.9 | 11.9 |
| Sunshine duration (h) | 11.8 | 11.5 | 8.9 | 7 | 9.6 | 8.1 | 4.8 | 4 | 11.4 | 11.3 | 10.8 | 11.3 | 11.2 | 11.2 | 8.9 | 10.8 | 11.1 | 11.1 | 11 | 8.4 | 5 | 7.3 | 2.3 | 9.7 | 10.1 | 8.2 | 10.6 | 9 | 8.5 | 7.9 |
| Precipitation (mm) | 0 | 0.8 | 41.6 | 6.2 | 0 | 1.1 | 38.4 | 90 | 1.3 | 0 | 0.7 | 0.3 | 0.1 | 0.1 | 0.3 | 0.1 | 0 | 0 | 0 | 18 | 5.4 | 35.2 | 2.1 | 0 | 0 | 0 | 0 | 0.6 | 2.4 | 0.5 |
| Precipitation hours | 0 | 2 | 13 | 15 | 0 | 5 | 12 | 14 | 4 | 0 | 5 | 3 | 1 | 1 | 2 | 1 | 0 | 0 | 0 | 10 | 9 | 21 | 5 | 0 | 0 | 0 | 0 | 4 | 12 | 4 |
| Wind speed (m/s) | 27.7 | 18.5 | 24.8 | 22.1 | 31.1 | 27.8 | 30.2 | 31.1 | 26.6 | 15.5 | 12 | 16.9 | 18.6 | 20.7 | 14.5 | 15.1 | 26.3 | 26.4 | 27.4 | 15 | 43.5 | 19.6 | 22.4 | 25.7 | 17.9 | 11.3 | 20.5 | 17.1 | 15.8 | 27.2 |
In September 2023, the highest daytime temperature in Yachiyo was 34.5°C.
While the minimum temperature at night dropped to 17.6°C.
The average nighttime and daytime temperatures during September in Yachiyo are 23.2°C and 30°C respectively.
The precipitation sum in September is about 245 mm.