| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 33°/21° | 0.0 mm |
| 2026-09-02 | 小毛毛雨 | 29°/21° | 0.4 mm |
| 2026-09-03 | 中雨 | 31°/21° | 11.6 mm |
| 2026-09-04 | 小毛毛雨 | 30°/19° | 0.8 mm |
| 2026-09-05 | 阴 | 26°/20° | 0.0 mm |
| 2026-09-06 | 多云 | 26°/14° | 0.0 mm |
| 2026-09-07 | 晴间多云 | 26°/13° | 0.0 mm |
| 2026-09-08 | 晴天 | 28°/12° | 0.0 mm |
| 2026-09-09 | 阴 | 31°/16° | 0.0 mm |
| 2026-09-10 | 阴 | 29°/22° | 0.0 mm |
| 2026-09-11 | 阴 | 26°/19° | 0.0 mm |
| 2026-09-12 | 阴 | 25°/17° | 0.0 mm |
| 2026-09-13 | 小毛毛雨 | 30°/21° | 1.2 mm |
| 2026-09-14 | 小毛毛雨 | 24°/14° | 0.4 mm |
| 2026-09-15 | 晴天 | 25°/9° | 0.0 mm |
| 2026-09-16 | 阴 | 30°/13° | 0.0 mm |
| 2026-09-17 | 毛毛雨 | 28°/19° | 0.7 mm |
| 2026-09-18 | 阴 | 26°/21° | 0.0 mm |
| 2026-09-19 | 阴 | 24°/16° | 0.0 mm |
| 2026-09-20 | 阴 | 26°/20° | 0.0 mm |
| 2026-09-21 | 中雨 | 21°/16° | 4.4 mm |
| 2026-09-22 | 中雨 | 16°/13° | 15.6 mm |
| 2026-09-23 | 阴 | 17°/12° | 0.0 mm |
| 2026-09-24 | 阴 | 18°/8° | 0.0 mm |
| 2026-09-25 | 阴 | 22°/6° | 0.0 mm |
| 2026-09-26 | 小雨 | 21°/11° | 2.9 mm |
| 2026-09-27 | 毛毛雨 | 17°/15° | 2.2 mm |
| 2026-09-28 | 阴 | 19°/15° | 0.0 mm |
| 2026-09-29 | 阴 | 22°/16° | 0.0 mm |
| 2026-09-30 | 阴 | 25°/15° | 0.0 mm |
2026年09月华盛顿共记录 30 天，平均最高 25℃、最低 15℃，降水日 10 天。