| 2025年 | 2026年 | 平年値 | |
| 4-30 | 14.4 | 15.6 | 14.6 |
| 5-1 | 14.5 | 15.5 | 14.8 |
| 5-2 | 14.4 | 15.4 | 15 |
| 5-3 | 14.6 | 15.7 | 14.9 |
| 5-4 | 15.1 | 15.6 | 15.2 |
| 5-5 | 15.2 | 15.6 | 15.4 |
| 5-6 | 15 | 15.5 | 15.4 |
| 5-7 | 15.3 | 15.6 | 15.6 |
| 5-8 | 15.5 | 15.8 | 15.7 |
| 5-9 | 15.5 | 16.3 | 15.7 |
| 5-10 | 15.5 | 16.2 | 15.9 |
| 5-11 | 15.8 | 16.3 | 16.1 |
| 5-12 | 15.9 | 16.6 | 16.2 |
| 5-13 | 16 | --- | 16.2 |
| 5-14 | 16.3 | --- | 16.4 |