| 2025年 | 2026年 | 平年値 | |
| 8-6 | 27.3 | 26.8 | 26.2 |
| 8-7 | 27.4 | 26.9 | 26.2 |
| 8-8 | 27.7 | 27.2 | 26.5 |
| 8-9 | 27.5 | 26.8 | 26.8 |
| 8-10 | 27.1 | 26.6 | 27.2 |
| 8-11 | 26.8 | 27 | 27.2 |
| 8-12 | 26.7 | 26.9 | 27.2 |
| 8-13 | 26.9 | 26.5 | 27.3 |
| 8-14 | 27.3 | 27 | 27.5 |
| 8-15 | 27.5 | 27.2 | 27.5 |
| 8-16 | 27.7 | 27.1 | 27.6 |
| 8-17 | 27.8 | 27.1 | 28.2 |
| 8-18 | 27.7 | 27 | 28.1 |
| 8-19 | 28.2 | 27.2 | 28 |
| 8-20 | 28.6 | 27.1 | 27.5 |