| 2024年 | 2025年 | 平年値 | |
| 12-11 | 15.1 | 15.8 | 15.8 |
| 12-12 | 14.8 | 15 | 15.4 |
| 12-13 | 14.9 | 15.1 | 15.1 |
| 12-14 | 14.3 | 15.1 | 14.8 |
| 12-15 | 14.3 | --- | 14.3 |
| 12-16 | 14.7 | 14.3 | 14.5 |
| 12-17 | 14.3 | 14.6 | 14.1 |
| 12-18 | 14.3 | 14.7 | 12.7 |
| 12-19 | 14.1 | 14.8 | 12.9 |
| 12-20 | 14.2 | 15.1 | 12.2 |
| 12-21 | 13.9 | 15.3 | 13 |
| 12-22 | 14 | 14.6 | 13.1 |
| 12-23 | 13 | 14.6 | 12.5 |
| 12-24 | 12.5 | 15 | 13.1 |
| 12-25 | 12.5 | --- | 12.6 |