| 2025年 | 2026年 | 平年値 | |
| 4-16 | 17.3 | 22.4 | 17.3 |
| 4-17 | 18.1 | 28.2 | 18.1 |
| 4-18 | 17.6 | 25.9 | 8.8 |
| 4-19 | --- | 22.8 | |
| 4-20 | --- | 28.5 | |
| 4-21 | --- | 17.6 | |
| 4-22 | --- | 23.6 | 0 |
| 4-23 | --- | 13.6 | 0 |
| 4-24 | --- | 16.1 | |
| 4-25 | --- | 16.8 | |
| 4-26 | 15.4 | 18.2 | 15.4 |
| 4-27 | --- | 18.1 | |
| 4-28 | 18.3 | 30.1 | 18.3 |
| 4-29 | --- | 14.9 | |
| 4-30 | --- | 18.8 |