| 2025年 | 2026年 | 平年値 | |
| 5-12 | --- | 16.3 | 8.6 |
| 5-13 | --- | 16.5 | 10.6 |
| 5-14 | --- | 17.2 | 12.7 |
| 5-15 | --- | 18 | 11.2 |
| 5-16 | --- | 17.8 | 9.6 |
| 5-17 | --- | 18.2 | 11.3 |
| 5-18 | --- | 18.3 | 10.6 |
| 5-19 | --- | 18 | 10.3 |
| 5-20 | --- | 17.6 | 9.3 |
| 5-21 | --- | 17.3 | 9.2 |
| 5-22 | --- | 1.8 | 8.9 |
| 5-23 | --- | 18.3 | 8 |
| 5-24 | --- | 18 | 9.4 |
| 5-25 | --- | 18.1 | 9.1 |
| 5-26 | --- | --- | 9.1 |