| 2025年 | 2026年 | 平年値 | |
| 1-10 | 11.6 | 12.4 | 12.5 |
| 1-11 | 11.5 | 12.3 | 12.5 |
| 1-12 | 11.8 | 11.6 | 12.2 |
| 1-13 | 11.6 | 11.8 | 12.1 |
| 1-14 | 11.4 | 11.3 | 11.9 |
| 1-15 | 11.4 | 11.3 | 11.8 |
| 1-16 | 11 | 11.5 | 11.6 |
| 1-17 | 11 | 11.5 | 11.5 |
| 1-18 | 10.8 | 11.5 | 11.4 |
| 1-19 | 10.7 | 11.5 | 11.5 |
| 1-20 | 10.9 | 11.5 | 11.4 |
| 1-21 | 10.7 | 11.2 | 11.3 |
| 1-22 | 10.7 | --- | 11.4 |
| 1-23 | 10.5 | --- | 11.3 |
| 1-24 | 10.5 | --- | 11.1 |