Average temperature in December is 8.7 °C
Average daytime temperature is 12.5 °C
Average night temperature is 5.2 °C
Absolute maximum temperature: 21.8 °C
Absolute minimum temperature: -2.3 °C
Number of sunny days: 16
Number of rainy days: 15
Number of snow days:
Precipitation sum: 96 mm
* Weather data for Isahaya Japan is based on climate observations for 2023 year
| December (°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 | 10.7 | 11.3 | 13.5 | 13.8 | 15.5 | 15.4 | 13.7 | 15.4 | 19.2 | 19.9 | 17.9 | 16.7 | 16.1 | 18.1 | 21.8 | 11.2 | 5.4 | 7.2 | 6.4 | 9 | 4.1 | 3.4 | 5.6 | 10.1 | 7.6 | 9.7 | 13.4 | 14.4 | 13.7 | 14.9 | 12.9 |
| Apparent max temperature | 5.7 | 8.7 | 10.6 | 12 | 13.1 | 13.6 | 10.9 | 13 | 18.3 | 18.1 | 18.4 | 18.5 | 13.8 | 17.6 | 21.1 | 8.6 | -0.4 | 4.1 | 4.4 | 6.1 | -0.7 | -1 | 2.1 | 6.7 | 3.8 | 7.5 | 11.4 | 12.4 | 11.5 | 13.5 | 10.5 |
| Mean temperature | 6.1 | 7.4 | 8.8 | 10.6 | 9.8 | 12.3 | 8.7 | 12.3 | 14.3 | 14.9 | 16 | 13 | 12 | 16 | 16.4 | 6.6 | 2.3 | 4.6 | 4.8 | 4.8 | 0.4 | 0.7 | 2.8 | 4.9 | 5.8 | 7.2 | 8.2 | 9.4 | 8.3 | 11.2 | 8.7 |
| Apparent mean temperature | -1.3 | 0.5 | 1.4 | 5.8 | 3.4 | 3.4 | 1.7 | 6.4 | 8.6 | 9.7 | 13.2 | 6.4 | 6.8 | 11.7 | 8.8 | -2.5 | -4.1 | -0.4 | -0.3 | -2.9 | -6.1 | -6.2 | -3.8 | -1.9 | 1.2 | 1.6 | 1.5 | 2.3 | 0.7 | 7.1 | 2.4 |
| Minimum temperature | 2.2 | 3.7 | 4.3 | 8 | 5.9 | 6.3 | 4.6 | 8.6 | 10.1 | 11.9 | 14 | 10 | 8.7 | 12.8 | 11 | 2.3 | -0.2 | 2.6 | 3 | 0.9 | -2.3 | -2.2 | -0.1 | 1.5 | 4.3 | 4.1 | 4.1 | 4.7 | 3.5 | 8.7 | 5.3 |
| Apparent min temperature | 2.6 | 5 | 6.3 | 8.9 | 7.8 | 10.3 | 6 | 10.6 | 13.6 | 13.5 | 16.5 | 11.2 | 9.9 | 15.3 | 15.5 | 2.2 | -2 | 1.5 | 2.3 | 0.9 | -3.8 | -3.5 | -0.6 | 2.2 | 2.8 | 4.9 | 6.2 | 7.6 | 6.2 | 10 | 5.2 |
| December | 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 | 10.1 | 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) | 8.2 | 8.8 | 7.7 | 8.8 | 6.8 | 3.6 | 9.1 | 8.8 | 8.2 | 8.8 | 1.4 | 0.3 | 8.8 | 0.3 | 6.5 | 0 | 7.7 | 5.3 | 0 | 3.5 | 6 | 8.8 | 8 | 6 | 5 | 4.9 | 8.9 | 8.9 | 8.9 | 6 | 8.3 |
| Precipitation (mm) | 0 | 0 | 0 | 2.6 | 0.7 | 2.6 | 0 | 0 | 0 | 5.4 | 34.3 | 0.7 | 0 | 4.7 | 25.8 | 0.8 | 0 | 6.7 | 4.3 | 0.9 | 0 | 0 | 0 | 0.8 | 0 | 0 | 0 | 0 | 0 | 4.8 | 0.5 |
| Precipitation hours | 0 | 0 | 0 | 4 | 1 | 3 | 0 | 0 | 0 | 6 | 18 | 6 | 0 | 8 | 18 | 4 | 0 | 11 | 9 | 8 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 9 | 3 |
| Wind speed (m/s) | 21 | 8.3 | 14.2 | 8.7 | 8 | 19.2 | 14.4 | 13.6 | 11 | 15.8 | 23.7 | 22.5 | 22.4 | 21.4 | 27.2 | 23.3 | 20.8 | 9.5 | 10.7 | 20.5 | 17 | 18.9 | 9.4 | 14.6 | 14.5 | 10.8 | 7.9 | 7.9 | 8.4 | 19.2 | 26.9 |
In December 2023, the highest daytime temperature in Isahaya was 21.8°C.
While the minimum temperature at night dropped to -2.3°C.
The average nighttime and daytime temperatures during December in Isahaya are 5.2°C and 12.5°C respectively.
The precipitation sum in December is about 96 mm.