| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2023-12-01 | 小毛毛雨 | 10°/7° | 0.0 mm |
| 2023-12-02 | 晴间多云 | 11°/7° | 0.0 mm |
| 2023-12-03 | 多云 | 14°/7° | 0.0 mm |
| 2023-12-04 | 晴天 | 12°/7° | 0.0 mm |
| 2023-12-05 | 阴 | 10°/8° | 0.0 mm |
| 2023-12-06 | 大毛毛雨 | 15°/9° | 2.5 mm |
| 2023-12-07 | 阴 | 19°/9° | 0.0 mm |
| 2023-12-08 | 晴天 | 15°/9° | 0.0 mm |
| 2023-12-09 | 阴 | 16°/10° | 0.0 mm |
| 2023-12-10 | 阴 | 18°/11° | 0.0 mm |
| 2023-12-11 | 毛毛雨 | 13°/12° | 0.0 mm |
| 2023-12-12 | 中雨 | 16°/10° | 12.7 mm |
| 2023-12-13 | 毛毛雨 | 14°/9° | 0.0 mm |
| 2023-12-14 | 阴 | 13°/8° | 0.0 mm |
| 2023-12-15 | 毛毛雨 | 14°/9° | 0.3 mm |
| 2023-12-16 | 小毛毛雨 | 20°/12° | 0.0 mm |
| 2023-12-17 | 多云 | 15°/7° | 0.0 mm |
| 2023-12-18 | 阴 | 10°/5° | 0.0 mm |
| 2023-12-19 | 阴 | 8°/5° | 0.0 mm |
| 2023-12-20 | 阴 | 12°/7° | 0.0 mm |
| 2023-12-21 | 小毛毛雨 | 11°/5° | 0.0 mm |
| 2023-12-22 | 小毛毛雨 | 8°/4° | 0.0 mm |
| 2023-12-23 | 多云 | 8°/3° | 0.0 mm |
| 2023-12-24 | 阴 | 9°/4° | 0.0 mm |
| 2023-12-25 | 晴天 | 10°/4° | 0.0 mm |
| 2023-12-26 | 晴天 | 12°/5° | 0.0 mm |
| 2023-12-27 | 阴 | 11°/6° | 0.0 mm |
| 2023-12-28 | 多云 | 9°/5° | 0.0 mm |
| 2023-12-29 | 晴天 | 13°/6° | 0.0 mm |
| 2023-12-30 | 阴 | 12°/6° | 0.0 mm |
| 2023-12-31 | 大毛毛雨 | 12°/7° | 2.9 mm |
2023年12月立川市共记录 31 天，平均最高 12℃、最低 7℃，降水日 10 天。