| 2025年 | 2026年 | 平年値 | |
| 6-12 | 20.4 | --- | 21.7 |
| 6-11 | 20.2 | 23 | 21.6 |
| 6-10 | 20.4 | 22.8 | 21.4 |
| 6-9 | 20.5 | 22.6 | 21.3 |
| 6-8 | 20.7 | 22.8 | 21.3 |
| 6-7 | 21.1 | 23.2 | 21.2 |
| 6-6 | 20.6 | 23.3 | 21.1 |
| 6-5 | 20.7 | 23.3 | 21.1 |
| 6-4 | 20.8 | 23.4 | 20.9 |
| 6-3 | 20.9 | 23.3 | 20.8 |
| 6-2 | 20.8 | 23.5 | 20.9 |
| 6-1 | 20.4 | 23.3 | 20.9 |
| 5-31 | 21.2 | 23 | 21 |
| 5-30 | 21.4 | 22.8 | 20.8 |
| 5-29 | 21.8 | 22.6 | 20.7 |