| 2024年 | 2025年 | 平年値 | |
| 4-25 | --- | --- | 17.5 |
| 4-26 | --- | --- | 17.6 |
| 4-27 | --- | --- | 17.7 |
| 4-28 | --- | --- | 17.6 |
| 4-29 | --- | --- | 17.9 |
| 4-30 | --- | --- | 17.7 |
| 5-1 | --- | --- | 17.9 |
| 5-2 | --- | --- | 18.6 |
| 5-3 | --- | --- | 18.8 |
| 5-4 | --- | --- | 18.9 |
| 5-5 | --- | --- | 18.7 |
| 5-6 | --- | --- | 19.2 |
| 5-7 | --- | --- | 18.9 |
| 5-8 | --- | --- | 18.6 |
| 5-9 | --- | --- | 18.9 |