| 2023年 | 2024年 | 平年値 | |
| 12-13 | 15.1 | 14.5 | 15.2 |
| 12-14 | 15 | 14.2 | 15.2 |
| 12-15 | 15.5 | 14.7 | 15.2 |
| 12-16 | 16.1 | 14.5 | 15.2 |
| 12-17 | 15.4 | 14.3 | 15.1 |
| 12-18 | 14.7 | 14.5 | 14.4 |
| 12-19 | 14.5 | 13.6 | 14.3 |
| 12-20 | 14.4 | 12.7 | 14.2 |
| 12-21 | --- | 12.6 | 13.3 |
| 12-22 | 13.6 | 13.7 | 13.2 |
| 12-23 | 13.8 | 13.3 | 13.1 |
| 12-24 | 13.1 | 12.5 | 13.1 |
| 12-25 | 12.4 | 12.7 | 12.6 |
| 12-26 | 12.6 | 12.6 | 12.8 |
| 12-27 | 12.5 | --- | 12.5 |