| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 中阵雨 | 28°/23° | 10.7 mm |
| 2026-09-02 | 阵雨 | 31°/23° | 2.9 mm |
| 2026-09-03 | 小毛毛雨 | 32°/25° | 0.3 mm |
| 2026-09-04 | 雷阵雨 | 32°/24° | 16.3 mm |
| 2026-09-05 | 阴 | 32°/24° | 0.0 mm |
| 2026-09-06 | 雷阵雨 | 31°/24° | 12.8 mm |
| 2026-09-07 | 雷阵雨 | 31°/24° | 2.6 mm |
| 2026-09-08 | 雷阵雨 | 32°/24° | 5.4 mm |
| 2026-09-09 | 雷阵雨 | 30°/24° | 15.8 mm |
| 2026-09-10 | 中阵雨 | 28°/24° | 13.2 mm |
| 2026-09-11 | 中阵雨 | 31°/23° | 14.5 mm |
| 2026-09-12 | 雷阵雨 | 30°/22° | 15.0 mm |
| 2026-09-13 | 毛毛雨 | 24°/23° | 2.6 mm |
| 2026-09-14 | 大毛毛雨 | 23°/22° | 3.5 mm |
| 2026-09-15 | 中阵雨 | 25°/23° | 14.6 mm |
| 2026-09-16 | 毛毛雨 | 32°/23° | 2.0 mm |
| 2026-09-17 | 强阵雨 | 30°/23° | 46.1 mm |
| 2026-09-18 | 小毛毛雨 | 31°/23° | 1.2 mm |
| 2026-09-19 | 雷阵雨 | 32°/24° | 13.3 mm |
| 2026-09-20 | 雷阵雨 | 32°/23° | 33.1 mm |
| 2026-09-21 | 阴 | 31°/24° | 0.0 mm |
| 2026-09-22 | 雷阵雨 | 29°/23° | 20.3 mm |
| 2026-09-23 | 雷阵雨 | 29°/24° | 22.5 mm |
| 2026-09-24 | 中阵雨 | 26°/23° | 25.0 mm |
| 2026-09-25 | 中阵雨 | 25°/24° | 29.3 mm |
| 2026-09-26 | 阵雨 | 27°/23° | 19.4 mm |
| 2026-09-27 | 阵雨 | 29°/22° | 6.2 mm |
| 2026-09-28 | 阵雨 | 30°/23° | 14.7 mm |
| 2026-09-29 | 小毛毛雨 | 31°/23° | 0.4 mm |
| 2026-09-30 | 雷阵雨 | 33°/24° | 2.2 mm |
2026年09月成田共记录 30 天，平均最高 29℃、最低 23℃，降水日 28 天。