| 2025年 | 2026年 | 平年値 | |
| 3-31 | --- | 18.3 | 12.9 |
| 4-1 | --- | 17.8 | 13.9 |
| 4-2 | --- | 17.5 | 13 |
| 4-3 | --- | 17.8 | 12.9 |
| 4-4 | --- | 17.6 | 13.3 |
| 4-5 | --- | 17.6 | 13.1 |
| 4-6 | --- | 16.4 | 13.1 |
| 4-7 | --- | 17 | 13.5 |
| 4-8 | --- | 15.9 | 13.6 |
| 4-9 | --- | 15.6 | 13.8 |
| 4-10 | --- | 16 | 13.5 |
| 4-11 | --- | 16.1 | 13.9 |
| 4-12 | --- | --- | 13.6 |
| 4-13 | --- | 15.4 | 13.5 |
| 4-14 | --- | 16.2 | 13.6 |