| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 29°/20° | 0.0 mm |
| 2026-09-02 | 阴 | 30°/21° | 0.0 mm |
| 2026-09-03 | 阴 | 29°/20° | 0.0 mm |
| 2026-09-04 | 大毛毛雨 | 26°/20° | 3.2 mm |
| 2026-09-05 | 阴 | 25°/19° | 0.0 mm |
| 2026-09-06 | 晴间多云 | 25°/13° | 0.0 mm |
| 2026-09-07 | 阴 | 25°/12° | 0.0 mm |
| 2026-09-08 | 阴 | 25°/12° | 0.0 mm |
| 2026-09-09 | 小雨 | 25°/20° | 1.4 mm |
| 2026-09-10 | 阴 | 23°/14° | 0.0 mm |
| 2026-09-11 | 雾 | 24°/9° | 0.0 mm |
| 2026-09-12 | 阴 | 27°/14° | 0.0 mm |
| 2026-09-13 | 阴 | 22°/11° | 0.0 mm |
| 2026-09-14 | 雾 | 21°/7° | 0.0 mm |
| 2026-09-15 | 小毛毛雨 | 22°/15° | 1.6 mm |
| 2026-09-16 | 阴 | 22°/15° | 0.0 mm |
| 2026-09-17 | 阴 | 19°/16° | 0.0 mm |
| 2026-09-18 | 中雨 | 21°/12° | 2.9 mm |
| 2026-09-19 | 大雨 | 16°/12° | 31.0 mm |
| 2026-09-20 | 小毛毛雨 | 18°/14° | 0.8 mm |
| 2026-09-21 | 阴 | 16°/10° | 0.0 mm |
| 2026-09-22 | 阴 | 18°/7° | 0.0 mm |
| 2026-09-23 | 阴 | 19°/8° | 0.0 mm |
| 2026-09-24 | 阴 | 21°/10° | 0.0 mm |
| 2026-09-25 | 阴 | 18°/9° | 0.0 mm |
| 2026-09-26 | 雾 | 20°/5° | 0.0 mm |
| 2026-09-27 | 雾 | 22°/6° | 0.0 mm |
| 2026-09-28 | 阴 | 22°/8° | 0.0 mm |
| 2026-09-29 | 雾 | 23°/8° | 0.0 mm |
| 2026-09-30 | 毛毛雨 | 17°/14° | 2.9 mm |
2026年09月渥太华共记录 30 天，平均最高 22℃、最低 12℃，降水日 7 天。