| 2024年 | 2025年 | 平年値 | |
| 5-18 | 31.6 | 32.3 | 31.9 |
| 5-19 | 31.6 | 32.2 | 32 |
| 5-20 | 31.5 | 32.2 | 32 |
| 5-21 | 31.5 | 32.2 | 31.3 |
| 5-22 | 31.5 | 32.1 | 31.9 |
| 5-23 | 31.5 | 32.2 | 31.8 |
| 5-24 | 31.5 | 32.2 | 31.9 |
| 5-25 | 31.5 | 32.1 | 31.9 |
| 5-26 | 31.6 | 32.1 | 31.8 |
| 5-27 | 31.4 | 32.2 | 31.8 |
| 5-28 | 31.4 | --- | 31.8 |
| 5-29 | 31.2 | --- | 31.9 |
| 5-30 | 31.2 | --- | 32 |
| 5-31 | 31.1 | --- | 31.8 |
| 6-1 | 31.1 | --- | 31.7 |