Average temperature in September is 25.6 °C
Average daytime temperature is 30.1 °C
Average night temperature is 22.4 °C
Absolute maximum temperature: 36.1 °C
Absolute minimum temperature: 15.7 °C
Number of sunny days: 5
Number of rainy days: 25
Number of snow days:
Precipitation sum: 247 mm
* Weather data for Chikusei 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 | 35.5 | 36.1 | 33.4 | 28 | 33 | 29.7 | 30.4 | 24.3 | 29.7 | 31.8 | 30.6 | 31 | 31.7 | 32 | 30.7 | 31 | 32.6 | 32.8 | 32.7 | 32.1 | 28.4 | 27.1 | 24.2 | 25.9 | 26.1 | 26.9 | 29.4 | 30.5 | 28.5 | 26.9 |
| Apparent max temperature | 37.2 | 39.9 | 36.2 | 32.3 | 38.9 | 36.3 | 34.2 | 29.6 | 34.9 | 37.4 | 35.1 | 35.6 | 36.1 | 36.3 | 36.9 | 36.6 | 37.2 | 37.4 | 37.4 | 35.8 | 31.5 | 32.2 | 26.2 | 26.9 | 26.6 | 30 | 32.5 | 35.2 | 31.5 | 28.8 |
| Mean temperature | 29.5 | 29.2 | 28 | 25.8 | 27.9 | 25 | 25.5 | 22.9 | 26.2 | 27.2 | 26.7 | 26.3 | 26.7 | 27.6 | 26.3 | 27.4 | 28 | 27.6 | 26.8 | 25.5 | 25.6 | 23.5 | 21.6 | 20.2 | 21.6 | 23.2 | 23.7 | 25.5 | 23.5 | 23.6 |
| Apparent mean temperature | 30.2 | 30 | 28 | 28.3 | 30.6 | 26 | 23.3 | 19.9 | 27.4 | 29 | 28.4 | 26.8 | 28 | 29.6 | 28.7 | 30.3 | 29.1 | 28.1 | 27.1 | 25.4 | 27.4 | 24.4 | 17.8 | 15.1 | 20 | 24.2 | 23.8 | 23.9 | 22.6 | 24.1 |
| Minimum temperature | 25.2 | 24.5 | 24.2 | 24.4 | 24.9 | 22.2 | 22.2 | 20.6 | 23.4 | 24 | 23.4 | 22.7 | 23.2 | 24.1 | 23.8 | 24.6 | 24.7 | 23.5 | 22.5 | 21.6 | 23.2 | 21.4 | 18.6 | 15.7 | 18.4 | 21.1 | 20.9 | 21.6 | 20.1 | 21.2 |
| Apparent min temperature | 32.8 | 33.7 | 31.3 | 30.4 | 33.6 | 29.7 | 28.4 | 26.1 | 30.6 | 32.3 | 31.6 | 30.6 | 31.3 | 32.4 | 31.2 | 33.2 | 32.2 | 31.7 | 31.5 | 29.6 | 29.1 | 26.7 | 22.4 | 20 | 23 | 26.1 | 26.8 | 29.5 | 26.1 | 26.4 |
| 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 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 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 | 10.9 | 9.2 | 6.3 | 9.1 | 6.1 | 5.7 | 0.2 | 7.9 | 10.9 | 10.2 | 11 | 10.4 | 11.1 | 7.5 | 8.6 | 11.1 | 11.1 | 10.1 | 8.4 | 3.5 | 5.4 | 2 | 11 | 9.5 | 9.7 | 8 | 10.3 | 9.8 | 5.4 |
| Precipitation (mm) | 0 | 4.8 | 19.2 | 19.2 | 3 | 19.2 | 15.4 | 58.3 | 1.3 | 0.6 | 1.2 | 0.4 | 0 | 0.1 | 10.4 | 4.6 | 0.6 | 0.4 | 4.9 | 25.1 | 4.2 | 44.2 | 0.2 | 0 | 0 | 3.1 | 0.3 | 0.9 | 5.6 | 0 |
| Precipitation hours | 0 | 6 | 11 | 10 | 10 | 11 | 10 | 10 | 6 | 4 | 5 | 3 | 0 | 1 | 7 | 9 | 5 | 2 | 4 | 7 | 11 | 22 | 1 | 0 | 0 | 5 | 3 | 4 | 16 | 0 |
| Wind speed (m/s) | 20.9 | 13.2 | 24.6 | 31 | 12.6 | 12.5 | 24 | 31.8 | 16.6 | 13.7 | 12.3 | 13.8 | 13.5 | 12.4 | 15.2 | 9.7 | 16.7 | 18.5 | 17.7 | 11.5 | 27.7 | 18.5 | 13.7 | 19.1 | 12.5 | 7.2 | 18 | 14.8 | 14.4 | 14.5 |
In September 2023, the highest daytime temperature in Chikusei was 36.1°C.
While the minimum temperature at night dropped to 15.7°C.
The average nighttime and daytime temperatures during September in Chikusei are 22.4°C and 30.1°C respectively.
The precipitation sum in September is about 247 mm.