| 2024年 | 2025年 | 平年値 | |
| 12-4 | --- | 13.2 | 12.9 |
| 12-5 | --- | 12.2 | 12.6 |
| 12-6 | 14.5 | 11.9 | 12.8 |
| 12-7 | 13.8 | 12.3 | 12.6 |
| 12-8 | --- | 12.9 | 12.8 |
| 12-9 | --- | 13.3 | 12.9 |
| 12-10 | --- | 12.5 | 12.8 |
| 12-11 | --- | 11.6 | 13.4 |
| 12-12 | --- | 12.3 | 13.8 |
| 12-13 | --- | 11.2 | 13.6 |
| 12-14 | --- | 12.8 | 13.2 |
| 12-15 | --- | 11.8 | 12.5 |
| 12-16 | --- | 10.8 | 12.6 |
| 12-17 | --- | 10.9 | 11.7 |
| 12-18 | --- | --- | 10.4 |