| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2025-09-01 | 阴 | 31°/22° | 0.0 mm |
| 2025-09-02 | 小毛毛雨 | 32°/22° | 0.5 mm |
| 2025-09-03 | 大毛毛雨 | 29°/22° | 3.7 mm |
| 2025-09-04 | 阴 | 26°/21° | 0.0 mm |
| 2025-09-05 | 雷阵雨 | 23°/21° | 63.8 mm |
| 2025-09-06 | 阴 | 25°/19° | 0.0 mm |
| 2025-09-07 | 阴 | 29°/19° | 0.0 mm |
| 2025-09-08 | 毛毛雨 | 27°/21° | 0.8 mm |
| 2025-09-09 | 阵雨 | 26°/21° | 2.7 mm |
| 2025-09-10 | 毛毛雨 | 23°/21° | 2.9 mm |
| 2025-09-11 | 阵雨 | 22°/20° | 11.1 mm |
| 2025-09-12 | 阵雨 | 23°/19° | 4.0 mm |
| 2025-09-13 | 毛毛雨 | 25°/20° | 5.4 mm |
| 2025-09-14 | 阴 | 28°/21° | 0.0 mm |
| 2025-09-15 | 小毛毛雨 | 25°/21° | 0.4 mm |
| 2025-09-16 | 小毛毛雨 | 28°/21° | 0.4 mm |
| 2025-09-17 | 阴 | 29°/21° | 0.0 mm |
| 2025-09-18 | 雷阵雨 | 30°/19° | 5.3 mm |
| 2025-09-19 | 阵雨 | 21°/17° | 4.3 mm |
| 2025-09-20 | 毛毛雨 | 23°/18° | 2.9 mm |
| 2025-09-21 | 毛毛雨 | 26°/18° | 1.2 mm |
| 2025-09-22 | 阴 | 21°/16° | 0.0 mm |
| 2025-09-23 | 阴 | 20°/13° | 0.0 mm |
| 2025-09-24 | 阴 | 20°/14° | 0.0 mm |
| 2025-09-25 | 小毛毛雨 | 25°/15° | 0.4 mm |
| 2025-09-26 | 小毛毛雨 | 25°/18° | 0.5 mm |
| 2025-09-27 | 小雨 | 24°/16° | 2.0 mm |
| 2025-09-28 | 小毛毛雨 | 23°/16° | 1.0 mm |
| 2025-09-29 | 小毛毛雨 | 28°/19° | 1.0 mm |
| 2025-09-30 | 阴 | 21°/16° | 0.0 mm |
2025年09月日立市共记录 30 天，平均最高 25℃、最低 18℃，降水日 20 天。