| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阵雨 | 32°/23° | 6.4 mm |
| 2026-09-02 | 雷阵雨 | 31°/23° | 2.8 mm |
| 2026-09-03 | 强阵雨 | 24°/21° | 62.1 mm |
| 2026-09-04 | 中阵雨 | 22°/20° | 9.8 mm |
| 2026-09-05 | 小毛毛雨 | 25°/18° | 0.1 mm |
| 2026-09-06 | 小毛毛雨 | 27°/19° | 0.2 mm |
| 2026-09-07 | 小雨 | 27°/21° | 5.6 mm |
| 2026-09-08 | 强阵雨 | 25°/22° | 69.4 mm |
| 2026-09-09 | 强阵雨 | 24°/18° | 76.1 mm |
| 2026-09-10 | 小毛毛雨 | 24°/18° | 0.7 mm |
| 2026-09-11 | 小雨 | 22°/19° | 3.9 mm |
| 2026-09-12 | 阴 | 25°/20° | 0.0 mm |
| 2026-09-13 | 毛毛雨 | 30°/21° | 4.7 mm |
| 2026-09-14 | 阵雨 | 27°/19° | 10.2 mm |
| 2026-09-15 | 中阵雨 | 22°/19° | 19.3 mm |
| 2026-09-16 | 毛毛雨 | 20°/18° | 5.8 mm |
| 2026-09-17 | 小毛毛雨 | 24°/17° | 0.1 mm |
| 2026-09-18 | 阴 | 29°/18° | 0.0 mm |
| 2026-09-19 | 阴 | 30°/20° | 0.0 mm |
| 2026-09-20 | 小雨 | 26°/21° | 5.4 mm |
| 2026-09-21 | 中阵雨 | 24°/22° | 14.5 mm |
| 2026-09-22 | 阵雨 | 24°/18° | 6.4 mm |
| 2026-09-23 | 毛毛雨 | 27°/16° | 1.9 mm |
| 2026-09-24 | 阵雨 | 21°/19° | 10.2 mm |
| 2026-09-25 | 阴 | 25°/18° | 0.0 mm |
| 2026-09-26 | 中阵雨 | 22°/17° | 19.0 mm |
| 2026-09-27 | 小毛毛雨 | 25°/18° | 0.4 mm |
| 2026-09-28 | 中阵雨 | 21°/19° | 32.6 mm |
| 2026-09-29 | 阵雨 | 19°/16° | 7.7 mm |
| 2026-09-30 | 晴天 | 23°/14° | 0.0 mm |
2026年09月上越市共记录 30 天，平均最高 24℃、最低 19℃，降水日 25 天。