| 2025年 | 2026年 | 平年値 | |
| 4-30 | --- | 18.3 | 15 |
| 5-1 | --- | 19.4 | 15.2 |
| 5-2 | --- | 19.6 | 15.4 |
| 5-3 | --- | 20 | 15.3 |
| 5-4 | --- | 20.5 | 15.7 |
| 5-5 | --- | 18.8 | 15.9 |
| 5-6 | --- | 18.7 | 16.3 |
| 5-7 | --- | 17.9 | 16.3 |
| 5-8 | --- | 18.9 | 15.9 |
| 5-9 | --- | 18.2 | 15.9 |
| 5-10 | --- | 17.8 | 16.1 |
| 5-11 | --- | 18.1 | 16.6 |
| 5-12 | --- | 18.5 | 16.9 |
| 5-13 | --- | 19.1 | 16.9 |
| 5-14 | --- | 20 | 16.8 |