| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 29°/12° | 0.0 mm |
| 2026-09-02 | 小毛毛雨 | 16°/7° | 0.5 mm |
| 2026-09-03 | 阵雨 | 10°/6° | 27.1 mm |
| 2026-09-04 | 小毛毛雨 | 14°/6° | 0.6 mm |
| 2026-09-05 | 阴 | 17°/4° | 0.0 mm |
| 2026-09-06 | 阴 | 16°/5° | 0.0 mm |
| 2026-09-07 | 晴天 | 19°/5° | 0.0 mm |
| 2026-09-08 | 小毛毛雨 | 20°/6° | 0.1 mm |
| 2026-09-09 | 阴 | 22°/9° | 0.0 mm |
| 2026-09-10 | 毛毛雨 | 24°/11° | 1.5 mm |
| 2026-09-11 | 毛毛雨 | 19°/10° | 3.6 mm |
| 2026-09-12 | 晴天 | 17°/6° | 0.0 mm |
| 2026-09-13 | 阴 | 20°/5° | 0.0 mm |
| 2026-09-14 | 阴 | 20°/6° | 0.0 mm |
| 2026-09-15 | 阴 | 23°/9° | 0.0 mm |
| 2026-09-16 | 小毛毛雨 | 17°/10° | 0.4 mm |
| 2026-09-17 | 大毛毛雨 | 20°/9° | 2.2 mm |
| 2026-09-18 | 毛毛雨 | 18°/8° | 1.5 mm |
| 2026-09-19 | 毛毛雨 | 17°/8° | 0.6 mm |
| 2026-09-20 | 阴 | 17°/6° | 0.0 mm |
| 2026-09-21 | 小雨 | 18°/7° | 5.7 mm |
| 2026-09-22 | 小毛毛雨 | 12°/7° | 0.8 mm |
| 2026-09-23 | 阴 | 16°/5° | 0.0 mm |
| 2026-09-24 | 多云 | 17°/5° | 0.0 mm |
| 2026-09-25 | 阴 | 16°/5° | 0.0 mm |
| 2026-09-26 | 小毛毛雨 | 10°/5° | 0.9 mm |
| 2026-09-27 | 小毛毛雨 | 12°/2° | 1.1 mm |
| 2026-09-28 | 小毛毛雨 | 7°/0° | 0.1 mm |
| 2026-09-29 | 小阵雪 | 5°/1° | 2.9 mm |
| 2026-09-30 | 阴 | 8°/0° | 0.0 mm |
2026年09月伊尔库茨克共记录 30 天，平均最高 16℃、最低 6℃，降水日 16 天。