| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 小毛毛雨 | 32°/21° | 0.6 mm |
| 2026-09-02 | 大毛毛雨 | 33°/21° | 3.0 mm |
| 2026-09-03 | 中阵雨 | 24°/22° | 8.3 mm |
| 2026-09-04 | 强阵雨 | 23°/19° | 119.3 mm |
| 2026-09-05 | 小毛毛雨 | 22°/19° | 2.0 mm |
| 2026-09-06 | 阵雨 | 23°/21° | 7.2 mm |
| 2026-09-07 | 毛毛雨 | 24°/22° | 2.0 mm |
| 2026-09-08 | 毛毛雨 | 23°/22° | 4.5 mm |
| 2026-09-09 | 小毛毛雨 | 27°/21° | 0.6 mm |
| 2026-09-10 | 小毛毛雨 | 21°/19° | 0.4 mm |
| 2026-09-11 | 小毛毛雨 | 27°/20° | 0.3 mm |
| 2026-09-12 | 雷阵雨 | 27°/22° | 4.8 mm |
| 2026-09-13 | 雷阵雨伴有冰雹 | 30°/22° | 21.0 mm |
| 2026-09-14 | 雷阵雨伴有冰雹 | 28°/21° | 25.6 mm |
| 2026-09-15 | 雷阵雨 | 25°/21° | 18.7 mm |
| 2026-09-16 | 毛毛雨 | 25°/19° | 4.0 mm |
| 2026-09-17 | 小毛毛雨 | 25°/19° | 1.7 mm |
| 2026-09-18 | 强阵雨 | 22°/20° | 43.1 mm |
| 2026-09-19 | 毛毛雨 | 26°/21° | 7.7 mm |
| 2026-09-20 | 小毛毛雨 | 28°/21° | 0.4 mm |
| 2026-09-21 | 阴 | 26°/17° | 0.0 mm |
| 2026-09-22 | 晴天 | 26°/16° | 0.0 mm |
| 2026-09-23 | 毛毛雨 | 28°/17° | 1.4 mm |
| 2026-09-24 | 阴 | 29°/18° | 0.0 mm |
| 2026-09-25 | 小毛毛雨 | 27°/18° | 0.4 mm |
| 2026-09-26 | 中阵雨 | 23°/19° | 11.3 mm |
| 2026-09-27 | 雷阵雨 | 24°/21° | 15.6 mm |
| 2026-09-28 | 中阵雨 | 24°/20° | 11.2 mm |
| 2026-09-29 | 阵雨 | 20°/18° | 4.1 mm |
| 2026-09-30 | 阴 | 27°/17° | 0.0 mm |
2026年09月丰后大野市共记录 30 天，平均最高 25℃、最低 19℃，降水日 26 天。