| 2025年 | 2026年 | 平年値 | |
| 4-16 | --- | --- | 12.8 |
| 4-17 | --- | --- | 13.3 |
| 4-18 | --- | --- | 15 |
| 4-19 | --- | --- | 15.1 |
| 4-20 | --- | --- | 14.8 |
| 4-21 | --- | --- | 14.3 |
| 4-22 | --- | --- | 15.2 |
| 4-23 | --- | --- | 14.7 |
| 4-24 | --- | --- | 14.4 |
| 4-25 | --- | --- | 15.1 |
| 4-26 | --- | --- | 15.8 |
| 4-27 | --- | --- | 15.5 |
| 4-28 | --- | --- | 16.3 |
| 4-29 | --- | --- | 15.8 |
| 4-30 | --- | --- | 14.8 |