| 2025年 | 2026年 | 平年値 | |
| 6-8 | 19 | 20 | 19.3 |
| 6-9 | 18.9 | 20.1 | 19.5 |
| 6-10 | 18.8 | 20.2 | 19.5 |
| 6-11 | 18.9 | 20.6 | 19.6 |
| 6-12 | 19.1 | 21.1 | 19.8 |
| 6-13 | 19.3 | 21.1 | 19.9 |
| 6-14 | 19.1 | 21.1 | 19.9 |
| 6-15 | 19.6 | 21.1 | 20.1 |
| 6-16 | 19.8 | 21 | 20.2 |
| 6-17 | 20.3 | --- | 20.5 |
| 6-18 | 20.5 | --- | 20.8 |
| 6-19 | 20.8 | --- | 20.9 |
| 6-20 | 20.6 | --- | 20.8 |
| 6-21 | 20.1 | --- | 20.8 |
| 6-22 | 20.6 | --- | 21 |