| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 30°/16° | 0.0 mm |
| 2026-09-02 | 大毛毛雨 | 29°/17° | 1.1 mm |
| 2026-09-03 | 阴 | 28°/20° | 0.0 mm |
| 2026-09-04 | 雾 | 28°/19° | 0.0 mm |
| 2026-09-05 | 雾 | 28°/18° | 0.0 mm |
| 2026-09-06 | 阴 | 25°/18° | 0.0 mm |
| 2026-09-07 | 阴 | 27°/18° | 0.0 mm |
| 2026-09-08 | 小毛毛雨 | 27°/17° | 2.0 mm |
| 2026-09-09 | 晴间多云 | 26°/15° | 0.0 mm |
| 2026-09-10 | 晴间多云 | 26°/11° | 0.0 mm |
| 2026-09-11 | 阴 | 29°/15° | 0.0 mm |
| 2026-09-12 | 阴 | 23°/13° | 0.0 mm |
| 2026-09-13 | 阴 | 21°/9° | 0.0 mm |
| 2026-09-14 | 小雨 | 16°/7° | 3.7 mm |
| 2026-09-15 | 阴 | 20°/11° | 0.0 mm |
| 2026-09-16 | 小雨 | 23°/7° | 2.6 mm |
| 2026-09-17 | 大雨 | 20°/13° | 9.0 mm |
| 2026-09-18 | 小雨 | 16°/13° | 9.4 mm |
| 2026-09-19 | 小毛毛雨 | 15°/13° | 0.4 mm |
| 2026-09-20 | 阴 | 18°/12° | 0.0 mm |
| 2026-09-21 | 阴 | 15°/8° | 0.0 mm |
| 2026-09-22 | 阴 | 18°/8° | 0.0 mm |
| 2026-09-23 | 晴间多云 | 19°/7° | 0.0 mm |
| 2026-09-24 | 小毛毛雨 | 19°/11° | 0.4 mm |
| 2026-09-25 | 阴 | 20°/14° | 0.0 mm |
| 2026-09-26 | 阴 | 17°/13° | 0.0 mm |
| 2026-09-27 | 毛毛雨 | 19°/13° | 0.7 mm |
| 2026-09-28 | 雾 | 22°/11° | 0.0 mm |
| 2026-09-29 | 中雨 | 19°/15° | 5.5 mm |
| 2026-09-30 | 雾 | 21°/16° | 0.0 mm |
2026年09月华盛顿共记录 30 天，平均最高 22℃、最低 13℃，降水日 10 天。