| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 毛毛雨 | 24°/12° | 0.7 mm |
| 2026-09-02 | 阴 | 22°/17° | 0.0 mm |
| 2026-09-03 | 阵雨 | 26°/16° | 3.6 mm |
| 2026-09-04 | 阴 | 24°/15° | 0.0 mm |
| 2026-09-05 | 阴 | 21°/14° | 0.0 mm |
| 2026-09-06 | 阴 | 21°/11° | 0.0 mm |
| 2026-09-07 | 阴 | 25°/7° | 0.0 mm |
| 2026-09-08 | 阴 | 22°/11° | 0.0 mm |
| 2026-09-09 | 小雨 | 19°/10° | 4.1 mm |
| 2026-09-10 | 毛毛雨 | 25°/16° | 0.7 mm |
| 2026-09-11 | 晴天 | 20°/8° | 0.0 mm |
| 2026-09-12 | 雾 | 25°/6° | 0.0 mm |
| 2026-09-13 | 小雨 | 23°/15° | 3.3 mm |
| 2026-09-14 | 阴 | 18°/9° | 0.0 mm |
| 2026-09-15 | 雾 | 21°/3° | 0.0 mm |
| 2026-09-16 | 阴 | 25°/13° | 0.0 mm |
| 2026-09-17 | 小毛毛雨 | 24°/15° | 0.4 mm |
| 2026-09-18 | 阴 | 21°/10° | 0.0 mm |
| 2026-09-19 | 阴 | 18°/2° | 0.0 mm |
| 2026-09-20 | 中雨 | 11°/4° | 6.1 mm |
| 2026-09-21 | 阴 | 14°/7° | 0.0 mm |
| 2026-09-22 | 雾 | 18°/4° | 0.0 mm |
| 2026-09-23 | 雾 | 19°/3° | 0.0 mm |
| 2026-09-24 | 雾 | 20°/2° | 0.0 mm |
| 2026-09-25 | 雾 | 24°/3° | 0.0 mm |
| 2026-09-26 | 阴 | 23°/9° | 0.0 mm |
| 2026-09-27 | 阴 | 16°/12° | 0.0 mm |
| 2026-09-28 | 大毛毛雨 | 16°/12° | 2.2 mm |
| 2026-09-29 | 雾 | 14°/12° | 0.0 mm |
| 2026-09-30 | 阴 | 17°/11° | 0.0 mm |
2026年09月华盛顿共记录 30 天，平均最高 20℃、最低 9℃，降水日 8 天。