| 平成１７年 １月 |
結氷状況 （％） |
気温 （℃） |
| １/１ | 0 | -1.0 |
| ２ | 10 | -5.0 |
| ３ | 15 | -5.0 |
| ４ | 5 | 0 |
| ５ | 5 | -1.5 |
| ６ | 10 | -3.0 |
| ７ | 5 | -1.0 |
| ８ | 0 | -1.0 |
| ９ | 0 | -3.0 |
| １０ | 15 | -5.0 |
| １１ | 25 | -3.0 |
| １２ | 20 | -2.5 |
| １３ | 35 | -5.0 |
| １４ | 45 | -3.5 |
| １５ | 5 | +0.5 |
| １６ | 5 | -0.5 |
| １７ | 0 | 0.0 |
| １８ | 0 | -3.0 |
| １９ | 0 | +0.5 |
| ２０ | 0 | -2.0 |
| ２１ | 0 | -2.0 |
| ２２ | 5 | -5.0 |
| ２３ | 10 | -3.0 |
| ２４ | 5 | 0.0 |
| ２５ | 3 | -1.5 |
| ２６ | 0 | -0.5 |
| ２７ | 0 | -3.5 |
| ２８ | 0 | -3.5 |
| ２９ | 0 | -1.0 |
| ３０ | 0 | 0.0 |
| ３１ | 0 | -1.0 |
| 平成１７年 ２月 |
結氷状況 （％） |
気温 （℃） |
| ２/１ | 1 | -2.5 |
| ２ | 30 | -4.0 |
| ３ | 35 | -5.0 |
| ４ | 40 | -4.0 |
| ５ | 20 | -2.5 |
| ６ | 30 | -4.0 |
| ７ | 10 | -1.0 |
| ８ | 5 | -1.0 |
| ９ | 5 | 0.0 |
| １０ | 0 | +0.5 |
| １１ | 0 | -1.5 |
| １２ | 5 | -3.0 |
| １３ | 5 | -1.5 |
| １４ | 0 | -1.0 |
| １５ | 5 | -2.0 |
| １６ | 0 | +1.0 |
| １７ | 0 | +1.5 |
| １８ | 0 | +2.5 |
| １９ | 0 | 0.0 |
| ２０ | 0 | +1.0 |
| ２１ | 0 | 0.0 |
| ２２ | 0 | -2.5 |
| ２３ | 0 | -0.5 |
| ２４ | 0 | 0.0 |
| ２５ | 0 | +0.5 |
| ２６ | 0 | -1.0 |
| ２７ | 10 | 0.0 |
| ２８ | 0 | -3.0 |