| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 晴天 | 37°/24° | 0.0 mm |
| 2026-09-02 | 晴天 | 37°/24° | 0.0 mm |
| 2026-09-03 | 阴 | 36°/26° | 0.0 mm |
| 2026-09-04 | 多云 | 36°/23° | 0.0 mm |
| 2026-09-05 | 多云 | 36°/24° | 0.0 mm |
| 2026-09-06 | 阴 | 34°/22° | 0.0 mm |
| 2026-09-07 | 多云 | 37°/21° | 0.0 mm |
| 2026-09-08 | 阴 | 39°/25° | 0.0 mm |
| 2026-09-09 | 阴 | 30°/22° | 0.0 mm |
| 2026-09-10 | 阴 | 29°/20° | 0.0 mm |
| 2026-09-11 | 晴间多云 | 32°/19° | 0.0 mm |
| 2026-09-12 | 大毛毛雨 | 23°/15° | 1.1 mm |
| 2026-09-13 | 阴 | 24°/15° | 0.0 mm |
| 2026-09-14 | 阴 | 36°/17° | 0.0 mm |
| 2026-09-15 | 中雨 | 27°/16° | 6.5 mm |
| 2026-09-16 | 中雨 | 26°/16° | 7.6 mm |
| 2026-09-17 | 雾 | 29°/21° | 0.0 mm |
| 2026-09-18 | 阴 | 35°/22° | 0.0 mm |
| 2026-09-19 | 大毛毛雨 | 32°/21° | 1.5 mm |
| 2026-09-20 | 阴 | 21°/18° | 0.0 mm |
| 2026-09-21 | 阴 | 24°/16° | 0.0 mm |
| 2026-09-22 | 阴 | 22°/15° | 0.0 mm |
| 2026-09-23 | 雾 | 23°/13° | 0.0 mm |
| 2026-09-24 | 小毛毛雨 | 19°/15° | 0.8 mm |
| 2026-09-25 | 大毛毛雨 | 19°/16° | 2.2 mm |
| 2026-09-26 | 小雨 | 25°/16° | 2.2 mm |
| 2026-09-27 | 阴 | 26°/17° | 0.0 mm |
| 2026-09-28 | 雾 | 25°/17° | 0.0 mm |
| 2026-09-29 | 毛毛雨 | 24°/18° | 1.9 mm |
| 2026-09-30 | 小雨 | 22°/20° | 9.4 mm |
2026年09月华盛顿共记录 30 天，平均最高 28℃、最低 19℃，降水日 9 天。