| 2025年 | 2026年 | 平年値 | |
| 8-3 | --- | 28.8 | 25.8 |
| 8-4 | --- | 29 | 25.2 |
| 8-5 | --- | 27.8 | 25.8 |
| 8-6 | --- | 27.6 | 26.2 |
| 8-7 | --- | 27.1 | 26.8 |
| 8-8 | --- | 28 | 26.4 |
| 8-9 | --- | 28.1 | 27.7 |
| 8-10 | --- | 28.5 | 27.2 |
| 8-11 | --- | 28.3 | 27.8 |
| 8-12 | --- | 28.5 | 27.9 |
| 8-13 | --- | 27.9 | 27.6 |
| 8-14 | --- | 28.3 | 27.5 |
| 8-15 | --- | 28.6 | 26.9 |
| 8-16 | --- | 28.6 | 27.1 |
| 8-17 | --- | --- | 26.7 |