| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2025-05-01 | 多云 | 28°/6° | 0.0 mm |
| 2025-05-02 | 阴 | 23°/10° | 0.0 mm |
| 2025-05-03 | 阴 | 15°/8° | 0.0 mm |
| 2025-05-04 | 阴 | 18°/4° | 0.0 mm |
| 2025-05-05 | 晴间多云 | 24°/4° | 0.0 mm |
| 2025-05-06 | 阴 | 28°/8° | 0.0 mm |
| 2025-05-07 | 阴 | 21°/9° | 0.0 mm |
| 2025-05-08 | 多云 | 20°/6° | 0.0 mm |
| 2025-05-09 | 阴 | 24°/6° | 0.0 mm |
| 2025-05-10 | 阴 | 21°/9° | 0.0 mm |
| 2025-05-11 | 中雨 | 15°/10° | 3.6 mm |
| 2025-05-12 | 中雨 | 14°/9° | 4.4 mm |
| 2025-05-13 | 阴 | 15°/8° | 0.0 mm |
| 2025-05-14 | 中雨 | 16°/10° | 3.6 mm |
| 2025-05-15 | 阴 | 13°/9° | 0.0 mm |
| 2025-05-16 | 阴 | 16°/8° | 0.0 mm |
| 2025-05-17 | 中雨 | 15°/10° | 9.1 mm |
| 2025-05-18 | 阴 | 14°/9° | 0.0 mm |
| 2025-05-19 | 小雨 | 17°/9° | 2.6 mm |
| 2025-05-20 | 阴 | 15°/9° | 0.0 mm |
| 2025-05-21 | 阴 | 20°/7° | 0.0 mm |
| 2025-05-22 | 阴 | 17°/11° | 0.0 mm |
| 2025-05-23 | 阴 | 20°/9° | 0.0 mm |
| 2025-05-24 | 阴 | 26°/8° | 0.0 mm |
| 2025-05-25 | 阴 | 18°/10° | 0.0 mm |
| 2025-05-26 | 阴 | 21°/12° | 0.0 mm |
| 2025-05-27 | 阴 | 28°/8° | 0.0 mm |
| 2025-05-28 | 晴间多云 | 28°/15° | 0.0 mm |
| 2025-05-29 | 阴 | 20°/12° | 0.0 mm |
| 2025-05-30 | 晴间多云 | 29°/9° | 0.0 mm |
| 2025-05-31 | 阴 | 19°/11° | 0.0 mm |
2025年05月波特兰共记录 31 天，平均最高 19℃、最低 8℃，降水日 5 天。