| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 23°/14° | 0.0 mm |
| 2026-09-02 | 大雨 | 22°/14° | 25.8 mm |
| 2026-09-03 | 小毛毛雨 | 25°/18° | 0.4 mm |
| 2026-09-04 | 阴 | 22°/18° | 0.0 mm |
| 2026-09-05 | 大雨 | 20°/14° | 7.6 mm |
| 2026-09-06 | 阴 | 21°/12° | 0.0 mm |
| 2026-09-07 | 阴 | 26°/14° | 0.0 mm |
| 2026-09-08 | 大毛毛雨 | 23°/15° | 1.1 mm |
| 2026-09-09 | 大雨 | 20°/14° | 20.0 mm |
| 2026-09-10 | 毛毛雨 | 22°/12° | 0.7 mm |
| 2026-09-11 | 阴 | 18°/9° | 0.0 mm |
| 2026-09-12 | 阴 | 23°/10° | 0.0 mm |
| 2026-09-13 | 小毛毛雨 | 24°/18° | 0.4 mm |
| 2026-09-14 | 阴 | 19°/10° | 0.0 mm |
| 2026-09-15 | 阴 | 17°/6° | 0.0 mm |
| 2026-09-16 | 阴 | 23°/16° | 0.0 mm |
| 2026-09-17 | 阴 | 20°/13° | 0.0 mm |
| 2026-09-18 | 晴天 | 19°/9° | 0.0 mm |
| 2026-09-19 | 多云 | 16°/5° | 0.0 mm |
| 2026-09-20 | 雾 | 16°/8° | 0.0 mm |
| 2026-09-21 | 阴 | 15°/8° | 0.0 mm |
| 2026-09-22 | 阴 | 17°/6° | 0.0 mm |
| 2026-09-23 | 晴间多云 | 19°/7° | 0.0 mm |
| 2026-09-24 | 晴天 | 21°/6° | 0.0 mm |
| 2026-09-25 | 阴 | 23°/8° | 0.0 mm |
| 2026-09-26 | 阴 | 23°/11° | 0.0 mm |
| 2026-09-27 | 阴 | 20°/12° | 0.0 mm |
| 2026-09-28 | 小毛毛雨 | 16°/12° | 0.4 mm |
| 2026-09-29 | 阴 | 16°/11° | 0.0 mm |
| 2026-09-30 | 阴 | 17°/10° | 0.0 mm |
2026年09月蒙特利尔共记录 30 天，平均最高 20℃、最低 11℃，降水日 8 天。