| 2025年 | 2026年 | 平年値 | |
| 4-4 | --- | 17.9 | 17.8 |
| 4-5 | --- | 17.5 | 15.5 |
| 4-6 | --- | 17.8 | 14.3 |
| 4-7 | --- | 17.6 | 15.4 |
| 4-8 | --- | 17.1 | 16.5 |
| 4-9 | --- | 17.2 | 15.7 |
| 4-10 | --- | 17.2 | 13.1 |
| 4-11 | --- | 17.5 | 16.9 |
| 4-12 | --- | --- | 18 |
| 4-13 | --- | 18 | 16.4 |
| 4-14 | --- | 18.3 | 16.4 |
| 4-15 | --- | 18.2 | 19.8 |
| 4-16 | --- | 17.6 | 18.4 |
| 4-17 | --- | 17 | 18 |
| 4-18 | --- | --- | 17.8 |