| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 18°/10° | 0.0 mm |
| 2026-09-02 | 晴天 | 18°/10° | 0.0 mm |
| 2026-09-03 | 晴天 | 18°/9° | 0.0 mm |
| 2026-09-04 | 晴天 | 19°/10° | 0.0 mm |
| 2026-09-05 | 晴天 | 19°/10° | 0.0 mm |
| 2026-09-06 | 雾 | 13°/9° | 0.0 mm |
| 2026-09-07 | 阴 | 17°/8° | 0.0 mm |
| 2026-09-08 | 晴天 | 21°/9° | 0.0 mm |
| 2026-09-09 | 晴天 | 24°/13° | 0.0 mm |
| 2026-09-10 | 晴天 | 24°/15° | 0.0 mm |
| 2026-09-11 | 小雨 | 23°/15° | 1.8 mm |
| 2026-09-12 | 阴 | 21°/14° | 0.0 mm |
| 2026-09-13 | 阴 | 21°/13° | 0.0 mm |
| 2026-09-14 | 阴 | 20°/12° | 0.0 mm |
| 2026-09-15 | 小毛毛雨 | 19°/12° | 0.4 mm |
| 2026-09-16 | 阴 | 20°/10° | 0.0 mm |
| 2026-09-17 | 小雨 | 16°/10° | 2.8 mm |
| 2026-09-18 | 阴 | 17°/9° | 0.0 mm |
| 2026-09-19 | 晴天 | 18°/8° | 0.0 mm |
| 2026-09-20 | 阴 | 18°/8° | 0.0 mm |
| 2026-09-21 | 小毛毛雨 | 15°/10° | 0.4 mm |
| 2026-09-22 | 小毛毛雨 | 15°/7° | 0.4 mm |
| 2026-09-23 | 晴间多云 | 17°/7° | 0.0 mm |
| 2026-09-24 | 阴 | 17°/10° | 0.0 mm |
| 2026-09-25 | 晴间多云 | 18°/9° | 0.0 mm |
| 2026-09-26 | 阴 | 17°/9° | 0.0 mm |
| 2026-09-27 | 大毛毛雨 | 16°/9° | 1.1 mm |
| 2026-09-28 | 大雨 | 12°/4° | 16.5 mm |
| 2026-09-29 | 中雨 | 10°/4° | 2.9 mm |
| 2026-09-30 | 多云 | 16°/5° | 0.0 mm |
2026年09月华盛顿共记录 30 天，平均最高 17℃、最低 9℃，降水日 8 天。