Average temperature in September is 19.6 °C
Average daytime temperature is 23.4 °C
Average night temperature is 16.5 °C
Absolute maximum temperature: 27.4 °C
Absolute minimum temperature: 10.7 °C
Number of sunny days: 10
Number of rainy days: 20
Number of snow days:
Precipitation sum: 154 mm
* Weather data for Rumoi 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 | 25.4 | 25.7 | 25.7 | 26.1 | 26.9 | 25 | 21.9 | 24.5 | 27 | 26 | 27.4 | 23.4 | 24.6 | 20 | 21.7 | 24.4 | 25.3 | 26.5 | 24.1 | 21.6 | 18.6 | 21 | 19.5 | 19.8 | 20.9 | 21.9 | 22.7 | 20.1 | 20.4 | 22.5 |
| Apparent max temperature | 30.9 | 28 | 28.8 | 28.5 | 32.5 | 28.1 | 20.9 | 28.1 | 30.5 | 30.2 | 31.4 | 27.6 | 26.9 | 21.1 | 23 | 26 | 28.4 | 30.8 | 26.6 | 18.4 | 17.6 | 20.5 | 19.6 | 19.9 | 21 | 22.8 | 23.9 | 20.7 | 20.8 | 22.4 |
| Mean temperature | 22.5 | 21.5 | 21.7 | 23.5 | 22.8 | 20.9 | 17.5 | 20.9 | 22.4 | 22.3 | 25 | 22.3 | 21.2 | 17.7 | 17.8 | 19.3 | 21.2 | 22.3 | 21.4 | 15.4 | 14.8 | 16.9 | 15.1 | 14.9 | 17.8 | 17.8 | 18.5 | 16.7 | 17.9 | 18.1 |
| Apparent mean temperature | 21.6 | 18.2 | 19.2 | 24.4 | 23.1 | 17.6 | 11 | 18.8 | 19.8 | 21.7 | 25.1 | 24.2 | 20.5 | 16.7 | 13.3 | 14.5 | 19.5 | 21.4 | 16 | 9.4 | 10.1 | 12.2 | 9.1 | 8.8 | 14.3 | 14.8 | 15.4 | 13.6 | 13.7 | 12.4 |
| Minimum temperature | 19.2 | 17.1 | 18 | 21.4 | 20.4 | 17.4 | 13.2 | 18.5 | 18.5 | 19.9 | 23.4 | 21.4 | 18.7 | 15.9 | 13.8 | 15.1 | 19.1 | 19.2 | 18.8 | 10.9 | 11.1 | 12.9 | 10.7 | 11 | 15.4 | 14.9 | 15.4 | 13.7 | 14.6 | 14.6 |
| Apparent min temperature | 26.2 | 23 | 23.9 | 26.1 | 26.5 | 22.4 | 16.5 | 22.1 | 24.8 | 24.8 | 27.9 | 25.9 | 23 | 19 | 17.8 | 19.9 | 23.4 | 25 | 22 | 12.9 | 14.2 | 16.2 | 14.1 | 13.7 | 17.5 | 18.5 | 18.8 | 16.9 | 16.2 | 17.4 |
| 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) | 13.2 | 13.2 | 13.1 | 13.1 | 13 | 13 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12 | 12 | 11.9 | 11.9 | 11.8 | 11.8 |
| Sunshine duration (h) | 2 | 12.1 | 11.6 | 3.4 | 6.8 | 10 | 11.8 | 11 | 11.2 | 10.3 | 8.5 | 3 | 8.4 | 2.1 | 10.5 | 11 | 4.7 | 6.3 | 6.2 | 10 | 4.1 | 10.3 | 11 | 10.6 | 6.2 | 9.9 | 8.9 | 2 | 10.2 | 8.2 |
| Precipitation (mm) | 17.4 | 0.4 | 0 | 0.4 | 6 | 1.9 | 0 | 0 | 0 | 0 | 0.7 | 54.8 | 0.5 | 21.3 | 0 | 0 | 23.5 | 1.6 | 6.9 | 0.3 | 0 | 0.4 | 0.4 | 0 | 0.8 | 3 | 0 | 4.3 | 2.9 | 6.7 |
| Precipitation hours | 12 | 3 | 0 | 2 | 7 | 8 | 0 | 0 | 0 | 0 | 6 | 19 | 3 | 13 | 0 | 0 | 16 | 9 | 13 | 3 | 0 | 3 | 3 | 0 | 5 | 10 | 0 | 12 | 4 | 9 |
| Wind speed (m/s) | 13.2 | 20.9 | 12.9 | 14.7 | 14 | 15.3 | 19 | 11.9 | 13.5 | 12.4 | 25 | 18.1 | 12.1 | 7.2 | 9.5 | 14.8 | 17.4 | 17.7 | 27.1 | 32.1 | 11.2 | 16 | 13.5 | 12.5 | 14.5 | 11.9 | 17.5 | 15.3 | 24.9 | 23.7 |
In September 2023, the highest daytime temperature in Rumoi was 27.4°C.
While the minimum temperature at night dropped to 10.7°C.
The average nighttime and daytime temperatures during September in Rumoi are 16.5°C and 23.4°C respectively.
The precipitation sum in September is about 154 mm.