| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-01-01 | 小雨 | 4°/1° | 5.1 mm |
| 2026-01-02 | 中雨 | 7°/4° | 8.2 mm |
| 2026-01-03 | 大雨 | 8°/5° | 11.9 mm |
| 2026-01-04 | 中雨 | 9°/5° | 10.1 mm |
| 2026-01-05 | 阴 | 8°/2° | 0.0 mm |
| 2026-01-06 | 大雨 | 7°/2° | 17.6 mm |
| 2026-01-07 | 中雨 | 7°/3° | 4.4 mm |
| 2026-01-08 | 阴 | 7°/1° | 0.0 mm |
| 2026-01-09 | 阴 | 9°/3° | 0.0 mm |
| 2026-01-10 | 阴 | 9°/1° | 0.0 mm |
| 2026-01-11 | 阴 | 11°/4° | 0.0 mm |
| 2026-01-12 | 阴 | 11°/3° | 0.0 mm |
| 2026-01-13 | 雾 | 9°/0° | 0.0 mm |
| 2026-01-14 | 雾 | 6°/1° | 0.0 mm |
| 2026-01-15 | 雾 | 12°/4° | 0.0 mm |
| 2026-01-16 | 多云 | 9°/1° | 0.0 mm |
| 2026-01-17 | 晴天 | 8°/2° | 0.0 mm |
| 2026-01-18 | 晴天 | 8°/0° | 0.0 mm |
| 2026-01-19 | 晴天 | 7°/0° | 0.0 mm |
| 2026-01-20 | 阴 | 7°/-2° | 0.0 mm |
| 2026-01-21 | 阴 | 5°/0° | 0.0 mm |
| 2026-01-22 | 阴 | 4°/-2° | 0.0 mm |
| 2026-01-23 | 阴 | 5°/0° | 0.0 mm |
| 2026-01-24 | 晴间多云 | 6°/-4° | 0.0 mm |
| 2026-01-25 | 阴 | 6°/-6° | 0.0 mm |
| 2026-01-26 | 阴 | 8°/-1° | 0.0 mm |
| 2026-01-27 | 阴 | 6°/0° | 0.0 mm |
| 2026-01-28 | 小毛毛雨 | 8°/3° | 0.8 mm |
| 2026-01-29 | 大毛毛雨 | 9°/7° | 3.8 mm |
| 2026-01-30 | 阴 | 9°/7° | 0.0 mm |
| 2026-01-31 | 阴 | 14°/6° | 0.0 mm |
2026年01月波特兰共记录 31 天，平均最高 7℃、最低 1℃，降水日 8 天。