| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2023-12-01 | 小雪 | 9°/4° | 16.0 mm |
| 2023-12-02 | 中雨 | 9°/5° | 11.5 mm |
| 2023-12-03 | 中雨 | 11°/5° | 5.9 mm |
| 2023-12-04 | 大雨 | 13°/5° | 45.7 mm |
| 2023-12-05 | 大雨 | 14°/9° | 42.1 mm |
| 2023-12-06 | 大毛毛雨 | 9°/8° | 2.6 mm |
| 2023-12-07 | 中雨 | 8°/5° | 4.3 mm |
| 2023-12-08 | 阴 | 6°/2° | 0.0 mm |
| 2023-12-09 | 小雪 | 4°/1° | 16.6 mm |
| 2023-12-10 | 大毛毛雨 | 12°/5° | 3.4 mm |
| 2023-12-11 | 阴 | 8°/7° | 0.0 mm |
| 2023-12-12 | 雾 | 7°/3° | 0.0 mm |
| 2023-12-13 | 阴 | 9°/1° | 0.0 mm |
| 2023-12-14 | 小毛毛雨 | 8°/5° | 0.8 mm |
| 2023-12-15 | 雾 | 10°/4° | 0.0 mm |
| 2023-12-16 | 雾 | 8°/2° | 0.0 mm |
| 2023-12-17 | 雾 | 8°/1° | 0.0 mm |
| 2023-12-18 | 小雨 | 9°/5° | 4.0 mm |
| 2023-12-19 | 小雨 | 9°/7° | 2.9 mm |
| 2023-12-20 | 雾 | 9°/6° | 0.0 mm |
| 2023-12-21 | 雾 | 9°/7° | 0.0 mm |
| 2023-12-22 | 小雨 | 7°/3° | 7.9 mm |
| 2023-12-23 | 雾 | 6°/1° | 0.0 mm |
| 2023-12-24 | 阴 | 5°/1° | 0.0 mm |
| 2023-12-25 | 中雨 | 8°/4° | 19.1 mm |
| 2023-12-26 | 中雨 | 10°/6° | 3.3 mm |
| 2023-12-27 | 毛毛雨 | 10°/7° | 0.7 mm |
| 2023-12-28 | 小雨 | 12°/7° | 1.8 mm |
| 2023-12-29 | 阴 | 13°/9° | 0.0 mm |
| 2023-12-30 | 小毛毛雨 | 10°/7° | 0.8 mm |
| 2023-12-31 | 雾 | 9°/4° | 0.0 mm |
2023年12月西雅图共记录 31 天，平均最高 9℃、最低 4℃，降水日 18 天。