| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 小毛毛雨 | 29°/23° | 0.1 mm |
| 2026-09-02 | 小毛毛雨 | 31°/24° | 0.1 mm |
| 2026-09-03 | 雷阵雨 | 32°/25° | 5.5 mm |
| 2026-09-04 | 大毛毛雨 | 27°/23° | 5.5 mm |
| 2026-09-05 | 中雨 | 25°/20° | 25.4 mm |
| 2026-09-06 | 中阵雨 | 22°/21° | 42.9 mm |
| 2026-09-07 | 强阵雨 | 24°/22° | 187.6 mm |
| 2026-09-08 | 毛毛雨 | 30°/22° | 1.7 mm |
| 2026-09-09 | 中阵雨 | 32°/21° | 9.5 mm |
| 2026-09-10 | 中阵雨 | 21°/19° | 15.1 mm |
| 2026-09-11 | 中雨 | 20°/19° | 29.5 mm |
| 2026-09-12 | 中阵雨 | 22°/20° | 11.4 mm |
| 2026-09-13 | 毛毛雨 | 26°/20° | 1.6 mm |
| 2026-09-14 | 小毛毛雨 | 29°/24° | 0.1 mm |
| 2026-09-15 | 强阵雨 | 26°/22° | 52.0 mm |
| 2026-09-16 | 中阵雨 | 22°/19° | 59.3 mm |
| 2026-09-17 | 中阵雨 | 24°/19° | 12.0 mm |
| 2026-09-18 | 阴 | 25°/19° | 0.0 mm |
| 2026-09-19 | 小毛毛雨 | 26°/21° | 0.2 mm |
| 2026-09-20 | 中阵雨 | 23°/21° | 37.3 mm |
| 2026-09-21 | 雷阵雨 | 25°/21° | 96.3 mm |
| 2026-09-22 | 小毛毛雨 | 31°/24° | 0.4 mm |
| 2026-09-23 | 小毛毛雨 | 23°/21° | 0.6 mm |
| 2026-09-24 | 阴 | 29°/21° | 0.0 mm |
| 2026-09-25 | 毛毛雨 | 28°/22° | 1.6 mm |
| 2026-09-26 | 阵雨 | 22°/18° | 12.6 mm |
| 2026-09-27 | 小毛毛雨 | 25°/19° | 0.9 mm |
| 2026-09-28 | 阵雨 | 24°/22° | 4.5 mm |
| 2026-09-29 | 阵雨 | 22°/17° | 34.1 mm |
| 2026-09-30 | 中雨 | 20°/17° | 14.5 mm |
2026年09月市川市共记录 30 天，平均最高 25℃、最低 20℃，降水日 28 天。