| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2025-12-01 | 阴 | 17°/9° | 0.0 mm |
| 2025-12-02 | 阴 | 14°/11° | 0.0 mm |
| 2025-12-03 | 毛毛雨 | 12°/7° | 1.9 mm |
| 2025-12-04 | 小毛毛雨 | 8°/3° | 0.3 mm |
| 2025-12-05 | 阴 | 10°/3° | 0.0 mm |
| 2025-12-06 | 阴 | 11°/3° | 0.0 mm |
| 2025-12-07 | 晴天 | 13°/4° | 0.0 mm |
| 2025-12-08 | 阴 | 15°/7° | 0.0 mm |
| 2025-12-09 | 阴 | 11°/6° | 0.0 mm |
| 2025-12-10 | 晴天 | 11°/5° | 0.0 mm |
| 2025-12-11 | 阴 | 12°/5° | 0.0 mm |
| 2025-12-12 | 阴 | 9°/2° | 0.0 mm |
| 2025-12-13 | 小毛毛雨 | 7°/2° | 0.5 mm |
| 2025-12-14 | 中雨 | 8°/4° | 14.0 mm |
| 2025-12-15 | 阴 | 11°/5° | 0.0 mm |
| 2025-12-16 | 阴 | 11°/4° | 0.0 mm |
| 2025-12-17 | 阴 | 11°/4° | 0.0 mm |
| 2025-12-18 | 多云 | 11°/4° | 0.0 mm |
| 2025-12-19 | 阴 | 10°/3° | 0.0 mm |
| 2025-12-20 | 中雨 | 13°/6° | 7.7 mm |
| 2025-12-21 | 中雨 | 15°/10° | 13.6 mm |
| 2025-12-22 | 小毛毛雨 | 11°/4° | 0.1 mm |
| 2025-12-23 | 阴 | 8°/2° | 0.0 mm |
| 2025-12-24 | 中雨 | 8°/6° | 11.0 mm |
| 2025-12-25 | 中雨 | 12°/7° | 9.7 mm |
| 2025-12-26 | 大毛毛雨 | 10°/1° | 3.3 mm |
| 2025-12-27 | 阴 | 6°/1° | 0.0 mm |
| 2025-12-28 | 晴天 | 9°/2° | 0.0 mm |
| 2025-12-29 | 阴 | 10°/4° | 0.0 mm |
| 2025-12-30 | 阴 | 13°/4° | 0.0 mm |
| 2025-12-31 | 阴 | 11°/4° | 0.0 mm |
2025年12月水户市共记录 31 天，平均最高 10℃、最低 4℃，降水日 10 天。