| 2024年 | 2025年 | 平年値 | |
| 12-15 | 16.7 | 16 | 15.8 |
| 12-16 | 17 | 16.1 | 16.2 |
| 12-17 | 16.4 | 16.8 | 16.1 |
| 12-18 | 16.3 | 16.2 | 15.9 |
| 12-19 | 16.3 | 16.1 | 16.1 |
| 12-20 | 16 | 16 | 15.4 |
| 12-21 | 15.6 | 16.4 | 15.1 |
| 12-22 | 14.8 | 16.4 | 14.6 |
| 12-23 | 14.8 | 16.6 | 14.7 |
| 12-24 | 15.3 | 16.3 | 15.4 |
| 12-25 | 15.4 | 15.8 | 15.4 |
| 12-26 | 14.7 | 15.1 | 15.5 |
| 12-27 | --- | 15 | 15.5 |
| 12-28 | --- | 15.1 | 15 |
| 12-29 | --- | 15.4 | 14.4 |