Average temperature in December is 16.3 °C
Average daytime temperature is 17.6 °C
Average night temperature is 14.9 °C
Absolute maximum temperature: 22.7 °C
Absolute minimum temperature: 9.9 °C
Number of sunny days: 6
Number of rainy days: 25
Number of snow days:
Precipitation sum: 115 mm
* Weather data for Hachijō Japan is based on climate observations for 2023 year
| Dicembre (°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 | 16.4 | 15.5 | 17 | 15.6 | 17.7 | 19 | 20.2 | 17.4 | 20 | 20.1 | 22.1 | 22.3 | 18 | 21.3 | 22.7 | 22.6 | 15.1 | 13.9 | 16 | 16.7 | 15.2 | 11.8 | 13.5 | 15.5 | 14.9 | 16.3 | 16.6 | 16.9 | 16.4 | 20.2 | 19.8 |
| Apparent max temperature | 10.6 | 10 | 11 | 14.2 | 14.8 | 16.3 | 13.7 | 15.5 | 19 | 19.2 | 19.8 | 20 | 15.5 | 18 | 18.4 | 18.9 | 6.5 | 8.7 | 13 | 10.2 | 6.8 | 3.6 | 8.9 | 11.2 | 12.1 | 9.8 | 13.8 | 12.7 | 12 | 15.2 | 15.6 |
| Mean temperature | 15.3 | 14.9 | 15.6 | 15.2 | 16.5 | 17.4 | 17.6 | 16.9 | 18.7 | 19.1 | 20.6 | 19.8 | 17.3 | 19.8 | 22.2 | 20.3 | 12.3 | 13 | 14.9 | 15.3 | 12.5 | 10.8 | 12.5 | 14.8 | 14 | 14.9 | 15.7 | 16.1 | 15.5 | 17.7 | 17.7 |
| Apparent mean temperature | 7.8 | 7.6 | 8.7 | 9.3 | 9.2 | 13.1 | 9.2 | 11.1 | 15.5 | 17.7 | 16 | 10 | 11.4 | 14.8 | 15.7 | 7 | 2.6 | 4 | 9.4 | 6.3 | 2.9 | 0.6 | 3.4 | 8.8 | 6.5 | 8 | 9.2 | 10 | 10 | 12.2 | 7.6 |
| Minimum temperature | 14.1 | 13.9 | 14.7 | 14.9 | 14.9 | 15.7 | 15.7 | 16 | 17.4 | 18.5 | 18.6 | 17 | 16.9 | 18.2 | 20.9 | 15.1 | 11.1 | 11.6 | 13.8 | 14.5 | 11.2 | 9.9 | 10.7 | 13.3 | 13.3 | 13.5 | 15.1 | 15.6 | 14.9 | 15.7 | 14.3 |
| Apparent min temperature | 9 | 9 | 9.3 | 11.4 | 12.5 | 14.8 | 11.2 | 13.8 | 16.6 | 18.3 | 18.1 | 15.5 | 13.8 | 16.2 | 17.4 | 14.8 | 3.5 | 6.6 | 11.3 | 8.4 | 4.2 | 2 | 6.7 | 9.9 | 8.9 | 8.8 | 11.4 | 11.1 | 10.7 | 13.7 | 11.3 |
| Dicembre | 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) | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Sunshine duration (h) | 6.4 | 9 | 9 | 8 | 0 | 7.3 | 8.2 | 9 | 9 | 8 | 6.1 | 4.3 | 9 | 8 | 7.8 | 7.6 | 5.9 | 5.7 | 7 | 4 | 2.1 | 8.9 | 5 | 1.8 | 2.4 | 7 | 8.9 | 8.8 | 8.9 | 8 | 4.9 |
| Precipitation (mm) | 0.4 | 0.7 | 1 | 0 | 41.6 | 8.6 | 0.4 | 0 | 0 | 0 | 6.1 | 9.7 | 0.4 | 0.7 | 0.5 | 3.4 | 0.2 | 0.3 | 12.4 | 0.8 | 0.8 | 2.9 | 0.1 | 0.6 | 1.4 | 0 | 0.6 | 0.5 | 0 | 5 | 16.3 |
| Precipitation hours | 3 | 5 | 8 | 0 | 18 | 11 | 2 | 0 | 0 | 0 | 12 | 16 | 2 | 7 | 5 | 8 | 2 | 3 | 15 | 3 | 6 | 12 | 1 | 5 | 7 | 0 | 2 | 3 | 0 | 5 | 13 |
| Wind speed (m/s) | 45.7 | 41.9 | 46 | 34.6 | 57.2 | 41.7 | 51.8 | 36.2 | 21.6 | 17.1 | 52.2 | 60.1 | 42.1 | 40.4 | 58.4 | 58.8 | 60.8 | 46.5 | 30.6 | 56 | 56.3 | 59.4 | 40.5 | 38.9 | 45.2 | 45.5 | 38.8 | 39.3 | 37.2 | 49.8 | 61.6 |
In December 2023, the highest daytime temperature in Hachijō was 22.7°C.
While the minimum temperature at night dropped to 9.9°C.
The average nighttime and daytime temperatures during December in Hachijō are 14.9°C and 17.6°C respectively.
The precipitation sum in December is about 115 mm.