Average temperature in January is 2.9 °C
Average daytime temperature is 7 °C
Average night temperature is -0.6 °C
Absolute maximum temperature: 17.5 °C
Absolute minimum temperature: -8.1 °C
Number of sunny days: 13
Number of rainy days: 16
Number of snow days: 2
Precipitation sum: 109 mm
* Weather data for Aso Japan is based on climate observations for 2023 year
| January (°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 | 6.5 | 7.7 | 5.5 | 5.7 | 7.5 | 7.3 | 6.8 | 7.5 | 10.9 | 10.9 | 11.8 | 12.5 | 15.6 | 17.5 | 12 | 6.7 | 7.3 | 3.8 | 5.8 | 6.2 | 5.4 | 8.1 | 9 | 0.8 | -2.3 | 4.4 | 2 | -0.5 | 3.1 | 5.2 | 6.5 |
| Apparent max temperature | 2.6 | 3.8 | 1.1 | 1 | 3.4 | 4 | 0.9 | 4.5 | 8.1 | 7.7 | 9.2 | 11.1 | 14.6 | 17.9 | 10.7 | 2.2 | 4.5 | 0.4 | 1.8 | 2.2 | 2 | 5.2 | 5.7 | -5.5 | -6.5 | 0.3 | -1.8 | -4.9 | -1.8 | 0.6 | 3.7 |
| Mean temperature | 2.2 | 1.6 | 0.6 | 0.7 | 2.4 | 4.1 | 2 | 3.3 | 6.7 | 4.3 | 7.6 | 9.6 | 13.5 | 12.3 | 7.9 | 3.1 | 3.8 | 0.5 | 2.6 | 1 | 0.4 | 3.7 | 4.5 | -5.4 | -4.6 | 1.8 | -2.2 | -2.7 | 0.4 | -0.6 | 3.3 |
| Apparent mean temperature | -5.2 | -6.1 | -6.1 | -6.1 | -4.4 | -2.2 | -4.9 | -3.4 | -1.5 | -4.2 | 2.4 | 4.1 | 10.3 | 5.5 | -0.8 | -4.2 | -3.7 | -6.4 | -3.6 | -7.9 | -7.2 | -2.3 | -3.7 | -13.5 | -11.4 | -4.5 | -9.7 | -9.7 | -5.8 | -8.7 | -5.3 |
| Minimum temperature | -2 | -2.9 | -2.8 | -2.3 | -0.5 | 1.6 | -1.9 | 0 | 2.5 | -0.8 | 5 | 7 | 12 | 7.8 | 2.8 | -0.4 | -0.7 | -2.9 | -0.6 | -3.5 | -2.5 | 1.8 | 0.6 | -8.1 | -6.9 | -0.5 | -5.2 | -5.6 | -2.2 | -4.8 | -1.4 |
| Apparent min temperature | -1 | -1.9 | -3 | -2.9 | -1 | 1 | -2 | 0.1 | 3.8 | 0.9 | 5.1 | 7.4 | 12.5 | 11.8 | 5.9 | -0.3 | 1 | -2.6 | -0.5 | -2.9 | -3.7 | 0 | 1.1 | -11.6 | -8.8 | -1.3 | -7 | -7.1 | -3.3 | -4.7 | -0.2 |
| January | 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) | 10 | 10 | 10 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.4 | 10.4 | 10.4 | 10.4 | 10.5 | 10.5 | 10.5 | 10.5 | 10.6 | 10.6 |
| Sunshine duration (h) | 8.9 | 9 | 9 | 9 | 9 | 4.6 | 7.9 | 9.1 | 9 | 9.1 | 9 | 0.2 | 0 | 3.8 | 2.4 | 5.8 | 5.9 | 0.6 | 3.9 | 5.4 | 9.1 | 3 | 6.8 | 6.1 | 6.1 | 4 | 4 | 8.3 | 3.6 | 9.5 | 9.3 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 1.7 | 0 | 0 | 0.8 | 0 | 0 | 0.8 | 68.6 | 1.2 | 12.2 | 0.4 | 0.9 | 1.6 | 0.1 | 0.7 | 0 | 12 | 1.4 | 2 | 0 | 3.7 | 1 | 0 | 0.2 | 0 | 0.1 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 2 | 0 | 0 | 3 | 19 | 7 | 21 | 3 | 5 | 8 | 1 | 3 | 0 | 19 | 8 | 5 | 0 | 6 | 6 | 0 | 2 | 0 | 1 |
| Wind speed (m/s) | 11.9 | 11.8 | 12 | 13.4 | 10.1 | 15.5 | 23.2 | 7.2 | 12.9 | 14.1 | 7.6 | 12.6 | 15.5 | 11.9 | 15.2 | 16.2 | 10.1 | 12 | 14.1 | 18.8 | 13.4 | 17.6 | 17.1 | 33.5 | 10.3 | 10.1 | 21.9 | 19.3 | 18.1 | 15.5 | 9.6 |
In January 2023, the highest daytime temperature in Aso was 17.5°C.
While the minimum temperature at night dropped to -8.1°C.
The average nighttime and daytime temperatures during January in Aso are -0.6°C and 7°C respectively.
The precipitation sum in January is about 109 mm.