| 2025年 | 2026年 | 平年値 | |
| 4-16 | 11.6 | 14 | 11.6 |
| 4-17 | 11.6 | 13.8 | 11.6 |
| 4-18 | 11.9 | 13.7 | 11.9 |
| 4-19 | 12.6 | 14 | 12.6 |
| 4-20 | 12.2 | 14 | 12.2 |
| 4-21 | 12.9 | 14 | 12.9 |
| 4-22 | 12.8 | 14.3 | 12.8 |
| 4-23 | 12.6 | 14.3 | 12.6 |
| 4-24 | 13 | 14.5 | 13 |
| 4-25 | 13.5 | 14.3 | 13.5 |
| 4-26 | 13.6 | 14.5 | 13.6 |
| 4-27 | 13.6 | 14.6 | 13.6 |
| 4-28 | 13.8 | 14.9 | 13.8 |
| 4-29 | 14 | 15.1 | 14 |
| 4-30 | 14 | 15.4 | 14 |