| 2024年 | 2025年 | 平年値 | |
| 5-20 | --- | --- | 18.9 |
| 5-21 | --- | --- | 19 |
| 5-22 | --- | --- | 19.2 |
| 5-23 | --- | --- | 19.4 |
| 5-24 | --- | --- | 19.6 |
| 5-25 | --- | --- | 19.7 |
| 5-26 | --- | --- | 20 |
| 5-27 | --- | --- | 20 |
| 5-28 | --- | --- | 20 |
| 5-29 | --- | --- | 20.1 |
| 5-30 | --- | --- | 20.3 |
| 5-31 | --- | --- | 20.1 |
| 6-1 | --- | --- | 20.5 |
| 6-2 | --- | --- | 20.6 |
| 6-3 | --- | --- | 20.7 |