| 2025年 | 2026年 | 平年値 | |
| 5-29 | 17.8 | 19.1 | 17.8 |
| 5-30 | 17.7 | 19.2 | 17.7 |
| 5-31 | 18 | 19.3 | 18 |
| 6-1 | 18.3 | 19.7 | 18.3 |
| 6-2 | 18.4 | 19.6 | 18.4 |
| 6-3 | 18.1 | 19.6 | 18.1 |
| 6-4 | 18.7 | 19.8 | 18.7 |
| 6-5 | 19 | 19.8 | 19 |
| 6-6 | 19 | 20.1 | 19 |
| 6-7 | 19.2 | 19.8 | 19.2 |
| 6-8 | 18.9 | 20 | 18.9 |
| 6-9 | 18.8 | 20 | 18.8 |
| 6-10 | 18.7 | 20.2 | 18.7 |
| 6-11 | 18.7 | 20.5 | 18.7 |
| 6-12 | 19 | --- | 19 |