| 2025年 | 2026年 | 平年値 | |
| 8-11 | 25.5 | 27.8 | 26 |
| 8-12 | 25.4 | 27.5 | 25.8 |
| 8-13 | 26.8 | 27.1 | 26.8 |
| 8-14 | 27.1 | 27.2 | 26.9 |
| 8-15 | 27 | 27.5 | 26.6 |
| 8-16 | 27 | 27.6 | 26.4 |
| 8-17 | 27.5 | 27.5 | 26.7 |
| 8-18 | 28 | --- | 26.5 |
| 8-19 | 28.3 | --- | 26.9 |
| 8-20 | 28.6 | --- | 26.8 |
| 8-21 | 28.4 | --- | 26.9 |
| 8-22 | 28 | --- | 27.1 |
| 8-23 | 27.9 | --- | 27 |
| 8-24 | 28.4 | --- | 27.2 |
| 8-25 | 27.6 | --- | 27 |