| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 晴天 | 30°/20° | 0.0 mm |
| 2026-09-02 | 晴天 | 30°/20° | 0.0 mm |
| 2026-09-03 | 阴 | 32°/21° | 0.0 mm |
| 2026-09-04 | 阴 | 33°/22° | 0.0 mm |
| 2026-09-05 | 阴 | 33°/22° | 0.0 mm |
| 2026-09-06 | 阴 | 31°/21° | 0.0 mm |
| 2026-09-07 | 中阵雨 | 29°/18° | 23.9 mm |
| 2026-09-08 | 中雨 | 23°/16° | 9.6 mm |
| 2026-09-09 | 阴 | 25°/17° | 0.0 mm |
| 2026-09-10 | 晴天 | 29°/16° | 0.0 mm |
| 2026-09-11 | 阴 | 30°/18° | 0.0 mm |
| 2026-09-12 | 阴 | 27°/18° | 0.0 mm |
| 2026-09-13 | 晴天 | 29°/18° | 0.0 mm |
| 2026-09-14 | 晴天 | 27°/17° | 0.0 mm |
| 2026-09-15 | 多云 | 28°/17° | 0.0 mm |
| 2026-09-16 | 阴 | 31°/19° | 0.0 mm |
| 2026-09-17 | 阴 | 30°/20° | 0.0 mm |
| 2026-09-18 | 小毛毛雨 | 28°/19° | 0.7 mm |
| 2026-09-19 | 阴 | 28°/18° | 0.0 mm |
| 2026-09-20 | 小毛毛雨 | 28°/21° | 0.2 mm |
| 2026-09-21 | 阴 | 30°/19° | 0.0 mm |
| 2026-09-22 | 阴 | 30°/20° | 0.0 mm |
| 2026-09-23 | 小毛毛雨 | 31°/20° | 0.6 mm |
| 2026-09-24 | 阵雨 | 25°/18° | 9.0 mm |
| 2026-09-25 | 阵雨 | 26°/18° | 2.7 mm |
| 2026-09-26 | 强阵雨 | 28°/18° | 30.4 mm |
| 2026-09-27 | 大毛毛雨 | 27°/18° | 1.8 mm |
| 2026-09-28 | 阴 | 25°/17° | 0.0 mm |
| 2026-09-29 | 毛毛雨 | 28°/18° | 2.3 mm |
| 2026-09-30 | 阴 | 20°/15° | 0.0 mm |
2026年09月北京市共记录 30 天，平均最高 28℃、最低 18℃，降水日 10 天。