| 2025年 | 2026年 | 平年値 | |
| 6-12 | 18.5 | --- | 18.5 |
| 6-11 | 18.7 | 20.1 | 18.7 |
| 6-10 | 18.1 | 19.8 | 18.1 |
| 6-9 | 18.4 | 19.8 | 18.4 |
| 6-8 | 18.4 | 19.6 | 18.4 |
| 6-7 | 18.6 | 19.6 | 18.6 |
| 6-6 | 18.4 | 19.6 | 18.4 |
| 6-5 | 18.5 | 19.5 | 18.5 |
| 6-4 | 18.1 | 19.6 | 18.1 |
| 6-3 | 17.8 | 18.9 | 17.8 |
| 6-2 | 18.1 | 19 | 18.1 |
| 6-1 | 17.9 | 19.3 | 17.9 |
| 5-31 | 17.6 | 19.1 | 17.6 |
| 5-30 | 17.3 | 18.9 | 17.3 |
| 5-29 | 17.1 | 18.6 | 17.1 |