| 2025年 | 2026年 | 平年値 | |
| 5-26 | 18 | 20.1 | 18.4 |
| 5-25 | 18.3 | 20.4 | 18.6 |
| 5-24 | 18.1 | 19.8 | 18.5 |
| 5-23 | 18.5 | 19.3 | 18.6 |
| 5-22 | 17.8 | 20 | 18.4 |
| 5-21 | 18.3 | 20.5 | 18.7 |
| 5-20 | 18 | 20.5 | 18.2 |
| 5-19 | 17.6 | 21.2 | 18.2 |
| 5-18 | 17.3 | 20.9 | 17.8 |
| 5-17 | 18.3 | 20.2 | 17.8 |
| 5-16 | 17.8 | 20.7 | 17.7 |
| 5-15 | 18.4 | 20 | 17.5 |
| 5-14 | 18.2 | 19.8 | 17.5 |
| 5-13 | 17.3 | 19.5 | 17.5 |
| 5-12 | 17.3 | 19.4 | 17.2 |