| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2023-12-01 | 阴 | 11°/6° | 0.0 mm |
| 2023-12-02 | 晴间多云 | 12°/4° | 0.0 mm |
| 2023-12-03 | 晴间多云 | 13°/6° | 0.0 mm |
| 2023-12-04 | 多云 | 13°/6° | 0.0 mm |
| 2023-12-05 | 小毛毛雨 | 12°/7° | 0.6 mm |
| 2023-12-06 | 毛毛雨 | 14°/9° | 5.0 mm |
| 2023-12-07 | 阴 | 18°/8° | 0.0 mm |
| 2023-12-08 | 晴间多云 | 16°/7° | 0.0 mm |
| 2023-12-09 | 阴 | 17°/8° | 0.0 mm |
| 2023-12-10 | 阴 | 19°/8° | 0.0 mm |
| 2023-12-11 | 毛毛雨 | 18°/10° | 0.0 mm |
| 2023-12-12 | 中雨 | 17°/10° | 15.8 mm |
| 2023-12-13 | 毛毛雨 | 13°/6° | 1.6 mm |
| 2023-12-14 | 阴 | 14°/7° | 0.0 mm |
| 2023-12-15 | 毛毛雨 | 19°/10° | 1.3 mm |
| 2023-12-16 | 阴 | 22°/16° | 0.0 mm |
| 2023-12-17 | 阴 | 16°/5° | 0.0 mm |
| 2023-12-18 | 阴 | 10°/3° | 0.0 mm |
| 2023-12-19 | 小毛毛雨 | 10°/5° | 0.0 mm |
| 2023-12-20 | 小毛毛雨 | 12°/6° | 0.0 mm |
| 2023-12-21 | 多云 | 9°/4° | 0.0 mm |
| 2023-12-22 | 晴间多云 | 8°/2° | 0.0 mm |
| 2023-12-23 | 晴间多云 | 9°/0° | 0.0 mm |
| 2023-12-24 | 阴 | 11°/2° | 0.0 mm |
| 2023-12-25 | 阴 | 12°/2° | 0.0 mm |
| 2023-12-26 | 多云 | 13°/3° | 0.0 mm |
| 2023-12-27 | 阴 | 11°/4° | 0.0 mm |
| 2023-12-28 | 小毛毛雨 | 10°/4° | 0.0 mm |
| 2023-12-29 | 多云 | 12°/3° | 0.0 mm |
| 2023-12-30 | 阴 | 14°/5° | 0.0 mm |
| 2023-12-31 | 中雨 | 13°/7° | 4.2 mm |
2023年12月君津市共记录 31 天，平均最高 13℃、最低 5℃，降水日 10 天。