| 2025年 | 2026年 | 平年値 | |
| 4-3 | --- | 18 | 15.7 |
| 4-4 | 16.7 | 17.8 | 16.1 |
| 4-5 | 16.6 | 17.4 | 16.3 |
| 4-6 | 17 | 18.1 | 16.3 |
| 4-7 | 17.5 | 17.8 | 16.6 |
| 4-8 | 17.5 | 16.5 | 16.9 |
| 4-9 | 17.3 | 17.6 | 16.5 |
| 4-10 | 17.9 | 17.8 | 16.5 |
| 4-11 | 17.2 | 17.9 | 16.3 |
| 4-12 | 17.3 | --- | 16.3 |
| 4-13 | 17.7 | 18.3 | 16.3 |
| 4-14 | 18 | 18.7 | 16.6 |
| 4-15 | 17.8 | 18.6 | 16.6 |
| 4-16 | 17.3 | 17.8 | 16.8 |
| 4-17 | 18.1 | --- | 17.1 |