| 2025年 | 2026年 | 平年値 | |
| 4-16 | 12.2 | 14.1 | 13.2 |
| 4-17 | 12.4 | 14.2 | 13.3 |
| 4-18 | 12.6 | 14.4 | 13.3 |
| 4-19 | 12.9 | 14.5 | 13.6 |
| 4-20 | 12.5 | 14.5 | 13.7 |
| 4-21 | 13.1 | 14.5 | 13.9 |
| 4-22 | 12.7 | 14.6 | 13.8 |
| 4-23 | 13.1 | 14.6 | 13.9 |
| 4-24 | 13.6 | 14.7 | 13.9 |
| 4-25 | 14.1 | 14.6 | 14.2 |
| 4-26 | 14 | 14.9 | 14.2 |
| 4-27 | 14.2 | 15 | 14.3 |
| 4-28 | 14.2 | 15.5 | 14.4 |
| 4-29 | 14.5 | --- | 14.5 |
| 4-30 | 14.4 | --- | 14.6 |