| 2025年 | 2026年 | 平年値 | |
| 1-30 | 15.8 | 15.5 | 14.7 |
| 1-31 | 15.9 | 15.5 | 14.5 |
| 2-1 | 15.9 | 15.6 | 14.5 |
| 2-2 | 16.1 | 15.8 | 14.6 |
| 2-3 | 16.1 | 16.2 | 14.7 |
| 2-4 | 15.7 | 16.5 | 14.9 |
| 2-5 | 15.4 | 16.5 | 14.7 |
| 2-6 | 15.2 | 16.4 | 14.3 |
| 2-7 | 15.2 | 16.1 | 14.1 |
| 2-8 | 15.1 | 15.4 | 14.4 |
| 2-9 | 15.2 | 15.1 | 14.5 |
| 2-10 | 15.2 | 15.3 | 14.8 |
| 2-11 | 15.2 | 16.2 | 14.2 |
| 2-12 | 15.6 | 15.5 | 15 |
| 2-13 | 15.7 | 15.6 | 15.2 |