| 2025年 | 2026年 | 平年値 | |
| 4-17 | 13.6 | --- | 13.9 |
| 4-18 | 14.3 | --- | 14.7 |
| 4-19 | 14.7 | --- | 14.6 |
| 4-20 | 13.3 | --- | 14 |
| 4-21 | 14.5 | --- | 14.4 |
| 4-22 | 14.5 | --- | 14.7 |
| 4-23 | 14.1 | --- | 14.1 |
| 4-24 | 14.5 | --- | 14.5 |
| 4-25 | 15.3 | --- | 15.2 |
| 4-26 | 14.8 | --- | 15.2 |
| 4-27 | 14.9 | --- | 14.9 |
| 4-28 | 15.1 | --- | 15.5 |
| 4-29 | 15.1 | --- | 15.1 |
| 4-30 | 15.5 | --- | 15.5 |
| 5-1 | 15.6 | --- | 15.5 |