| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2025-09-01 | 阴 | 36°/25° | 0.0 mm |
| 2025-09-02 | 毛毛雨 | 37°/27° | 1.0 mm |
| 2025-09-03 | 雷阵雨 | 32°/25° | 3.9 mm |
| 2025-09-04 | 毛毛雨 | 31°/24° | 0.6 mm |
| 2025-09-05 | 强阵雨 | 25°/23° | 66.6 mm |
| 2025-09-06 | 阴 | 29°/21° | 0.0 mm |
| 2025-09-07 | 阴 | 32°/22° | 0.0 mm |
| 2025-09-08 | 阴 | 31°/24° | 0.0 mm |
| 2025-09-09 | 阵雨 | 30°/24° | 3.2 mm |
| 2025-09-10 | 大毛毛雨 | 25°/23° | 3.5 mm |
| 2025-09-11 | 中阵雨 | 24°/22° | 13.1 mm |
| 2025-09-12 | 大毛毛雨 | 26°/21° | 1.5 mm |
| 2025-09-13 | 阵雨 | 29°/22° | 6.1 mm |
| 2025-09-14 | 阴 | 32°/25° | 0.0 mm |
| 2025-09-15 | 小毛毛雨 | 29°/23° | 1.2 mm |
| 2025-09-16 | 小毛毛雨 | 30°/24° | 0.4 mm |
| 2025-09-17 | 小毛毛雨 | 33°/24° | 0.4 mm |
| 2025-09-18 | 大毛毛雨 | 35°/21° | 6.8 mm |
| 2025-09-19 | 中阵雨 | 24°/20° | 8.8 mm |
| 2025-09-20 | 大毛毛雨 | 26°/20° | 2.7 mm |
| 2025-09-21 | 小毛毛雨 | 29°/21° | 0.4 mm |
| 2025-09-22 | 阴 | 24°/19° | 0.0 mm |
| 2025-09-23 | 阴 | 24°/17° | 0.0 mm |
| 2025-09-24 | 阴 | 24°/17° | 0.0 mm |
| 2025-09-25 | 阴 | 28°/18° | 0.0 mm |
| 2025-09-26 | 阴 | 29°/21° | 0.0 mm |
| 2025-09-27 | 阴 | 26°/21° | 0.0 mm |
| 2025-09-28 | 小毛毛雨 | 26°/19° | 0.9 mm |
| 2025-09-29 | 大毛毛雨 | 31°/22° | 1.6 mm |
| 2025-09-30 | 小毛毛雨 | 25°/21° | 0.2 mm |
2025年09月水户市共记录 30 天，平均最高 28℃、最低 21℃，降水日 19 天。