| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2025-12-01 | 小毛毛雨 | 15°/5° | 0.6 mm |
| 2025-12-02 | 小毛毛雨 | 14°/4° | 0.3 mm |
| 2025-12-03 | 小阵雪 | 4°/-3° | 0.6 mm |
| 2025-12-04 | 阴 | 2°/-4° | 0.0 mm |
| 2025-12-05 | 中雪 | 2°/-4° | 3.2 mm |
| 2025-12-06 | 晴天 | 7°/-4° | 0.0 mm |
| 2025-12-07 | 晴天 | 11°/0° | 0.0 mm |
| 2025-12-08 | 小毛毛雨 | 10°/2° | 0.9 mm |
| 2025-12-09 | 阴 | 6°/-2° | 0.0 mm |
| 2025-12-10 | 阴 | 8°/-1° | 0.0 mm |
| 2025-12-11 | 大毛毛雨 | 11°/2° | 2.3 mm |
| 2025-12-12 | 小毛毛雨 | 5°/-4° | 1.2 mm |
| 2025-12-13 | 毛毛雨 | 8°/-4° | 1.0 mm |
| 2025-12-14 | 中雨 | 5°/-1° | 12.0 mm |
| 2025-12-15 | 阴 | 4°/-2° | 0.0 mm |
| 2025-12-16 | 阴 | 8°/-2° | 0.0 mm |
| 2025-12-17 | 小雨 | 9°/0° | 5.2 mm |
| 2025-12-18 | 阴 | 8°/0° | 0.0 mm |
| 2025-12-19 | 阴 | 9°/0° | 0.0 mm |
| 2025-12-20 | 阴 | 13°/4° | 0.0 mm |
| 2025-12-21 | 大毛毛雨 | 10°/2° | 3.5 mm |
| 2025-12-22 | 阴 | 4°/-2° | 0.0 mm |
| 2025-12-23 | 小毛毛雨 | 9°/-1° | 0.1 mm |
| 2025-12-24 | 小毛毛雨 | 9°/5° | 0.8 mm |
| 2025-12-25 | 大毛毛雨 | 8°/-2° | 8.4 mm |
| 2025-12-26 | 小阵雪 | -1°/-5° | 2.8 mm |
| 2025-12-27 | 阴 | 2°/-7° | 0.0 mm |
| 2025-12-28 | 阴 | 5°/-4° | 0.0 mm |
| 2025-12-29 | 阴 | 8°/-2° | 0.0 mm |
| 2025-12-30 | 小毛毛雨 | 7°/0° | 1.0 mm |
| 2025-12-31 | 阴 | 3°/-4° | 0.0 mm |
2025年12月土佐市共记录 31 天，平均最高 7℃、最低 -1℃，降水日 16 天。