Average temperature in January is 3.6 °C
Average daytime temperature is 8.7 °C
Average night temperature is -0.7 °C
Absolute maximum temperature: 13.3 °C
Absolute minimum temperature: -6.4 °C
Number of sunny days: 18
Number of rainy days: 10
Number of snow days: 3
Precipitation sum: 30 mm
* Weather data for Koganei Japan is based on climate observations for 2023 year
| Gennaio (°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 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 11.2 | 9.2 | 9.3 | 9.1 | 9.1 | 7.9 | 8.9 | 10.7 | 12.9 | 8.8 | 9.8 | 10.8 | 13.3 | 10.7 | 11 | 6.4 | 7.4 | 12 | 7.9 | 11.5 | 7.2 | 6.5 | 4.3 | 9.4 | 3 | 6.9 | 4.6 | 7 | 6.8 | 9.9 | 7.4 |
| Apparent max temperature | 8 | 5.9 | 5.5 | 5.1 | 4.6 | 3.9 | 5.3 | 7.9 | 9 | 2.5 | 6.4 | 8.4 | 9.9 | 8.3 | 9.9 | 3.7 | 3.5 | 8.1 | 3.8 | 7.5 | 0.3 | 3.1 | 2 | 5.9 | -2.6 | 2.2 | 0.6 | 3.4 | 2.4 | 6.7 | 2 |
| Mean temperature | 4.8 | 2.9 | 2.9 | 2.5 | 1.6 | 3.9 | 3.2 | 5.3 | 6.9 | 2.9 | 2.9 | 3.8 | 8.4 | 9 | 8.3 | 4.1 | 4.5 | 6.7 | 5 | 5.8 | 3 | 3 | 2.9 | 0.8 | -2.2 | 1 | 0.7 | 0.7 | 1 | 3.2 | 2.2 |
| Apparent mean temperature | -4.9 | -7.4 | -7.1 | -7.3 | -7.1 | -2.8 | -5.7 | -3.7 | -4.4 | -7.1 | -5.4 | -4.8 | 1.7 | 4.7 | 3.9 | -4.7 | -2 | -1.4 | -3.3 | -5.8 | -5.2 | -3.7 | -2.4 | -11.5 | -10.4 | -6.7 | -7.3 | -8.7 | -7 | -6.8 | -7.3 |
| Minimum temperature | -1.1 | -3.1 | -2.8 | -2.9 | -3.1 | 0.5 | -1.8 | -0.2 | 3.2 | -2.7 | -1.8 | -1.2 | 4.3 | 7.5 | 6.4 | -0.4 | 1.4 | 2.6 | 0.2 | 1.5 | -0.6 | 0.9 | 0.9 | -6.4 | -5.9 | -2.3 | -2.5 | -3.9 | -2.7 | -0.8 | -3.6 |
| Apparent min temperature | 1.4 | -1.3 | -1.2 | -1.7 | -2.5 | 0.1 | -0.2 | 1.9 | 2.4 | -2.9 | -0.4 | 0.5 | 5.8 | 6.4 | 6.2 | -0.5 | 0.8 | 2.5 | 1.5 | 1.3 | -2.9 | -1 | -0.4 | -4.9 | -7.4 | -3.4 | -4.3 | -4.2 | -3 | -2.3 | -2 |
| Gennaio | 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 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 10 | 10 | 10 | 10 | 10 | 10.1 | 10.1 | 10.1 | 10.1 | 10.2 | 10.2 | 10.2 | 10.2 | 10.3 | 10.3 | 10.3 | 10.4 | 10.4 | 10.4 |
| Sunshine duration (h) | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.6 | 8.7 | 8.7 | 8.8 | 8.8 | 8.8 | 8.8 | 7.7 | 0.9 | 0 | 0.7 | 8.9 | 8 | 7.4 | 9.2 | 8.4 | 7.4 | 0 | 5.9 | 9.3 | 8.3 | 2.9 | 8.5 | 9.5 | 9.5 | 7.4 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0.5 | 0 | 0 | 0 | 0 | 1.6 | 8.4 | 7.1 | 0 | 0 | 0.9 | 0 | 0 | 0.1 | 3 | 3.2 | 0 | 0 | 4.3 | 0.6 | 0.2 | 0 | 0.4 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 4 | 19 | 9 | 0 | 0 | 7 | 0 | 0 | 1 | 9 | 7 | 0 | 0 | 10 | 2 | 1 | 0 | 4 |
| Wind speed (m/s) | 14.1 | 19.5 | 17.6 | 15.6 | 19.8 | 12.6 | 10.5 | 14.2 | 33.4 | 37.7 | 9 | 11.3 | 17.7 | 28.2 | 13.8 | 28.2 | 13.4 | 22.6 | 16.6 | 31.5 | 27.1 | 15.1 | 15.5 | 48.3 | 24.9 | 16.6 | 33.7 | 16.1 | 17.2 | 24.4 | 20.6 |
In January 2023, the highest daytime temperature in Koganei was 13.3°C.
While the minimum temperature at night dropped to -6.4°C.
The average nighttime and daytime temperatures during January in Koganei are -0.7°C and 8.7°C respectively.
The precipitation sum in January is about 30 mm.