| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阴 | 23°/12° | 0.0 mm |
| 2026-09-02 | 小毛毛雨 | 24°/13° | 0.5 mm |
| 2026-09-03 | 毛毛雨 | 21°/15° | 5.4 mm |
| 2026-09-04 | 阵雨 | 19°/9° | 4.5 mm |
| 2026-09-05 | 阴 | 20°/9° | 0.0 mm |
| 2026-09-06 | 晴天 | 24°/13° | 0.0 mm |
| 2026-09-07 | 阴 | 23°/12° | 0.0 mm |
| 2026-09-08 | 毛毛雨 | 21°/14° | 2.4 mm |
| 2026-09-09 | 毛毛雨 | 17°/9° | 5.0 mm |
| 2026-09-10 | 阴 | 20°/9° | 0.0 mm |
| 2026-09-11 | 阴 | 21°/11° | 0.0 mm |
| 2026-09-12 | 大毛毛雨 | 22°/14° | 3.1 mm |
| 2026-09-13 | 阴 | 24°/14° | 0.0 mm |
| 2026-09-14 | 阵雨 | 22°/14° | 3.5 mm |
| 2026-09-15 | 阴 | 18°/11° | 0.0 mm |
| 2026-09-16 | 阴 | 21°/10° | 0.0 mm |
| 2026-09-17 | 阴 | 23°/11° | 0.0 mm |
| 2026-09-18 | 晴天 | 23°/12° | 0.0 mm |
| 2026-09-19 | 阴 | 23°/11° | 0.0 mm |
| 2026-09-20 | 阴 | 21°/13° | 0.0 mm |
| 2026-09-21 | 阴 | 23°/13° | 0.0 mm |
| 2026-09-22 | 小毛毛雨 | 17°/9° | 0.1 mm |
| 2026-09-23 | 阴 | 19°/9° | 0.0 mm |
| 2026-09-24 | 中阵雨 | 16°/6° | 13.9 mm |
| 2026-09-25 | 阴 | 16°/6° | 0.0 mm |
| 2026-09-26 | 小毛毛雨 | 18°/8° | 0.1 mm |
| 2026-09-27 | 小雨 | 18°/9° | 9.3 mm |
| 2026-09-28 | 阵雨 | 23°/14° | 7.5 mm |
| 2026-09-29 | 大毛毛雨 | 16°/11° | 9.2 mm |
| 2026-09-30 | 阴 | 17°/8° | 0.0 mm |
2026年09月留萌国天盐郡共记录 30 天，平均最高 20℃、最低 10℃，降水日 13 天。