| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 阵雨 | 24°/15° | 5.5 mm |
| 2026-09-02 | 大毛毛雨 | 24°/15° | 5.5 mm |
| 2026-09-03 | 毛毛雨 | 23°/16° | 3.0 mm |
| 2026-09-04 | 阵雨 | 22°/15° | 6.4 mm |
| 2026-09-05 | 阵雨 | 21°/16° | 12.2 mm |
| 2026-09-06 | 阵雨 | 21°/15° | 13.7 mm |
| 2026-09-07 | 毛毛雨 | 21°/15° | 4.7 mm |
| 2026-09-08 | 大毛毛雨 | 21°/16° | 5.5 mm |
| 2026-09-09 | 阵雨 | 23°/16° | 8.8 mm |
| 2026-09-10 | 阵雨 | 20°/16° | 11.2 mm |
| 2026-09-11 | 阵雨 | 21°/16° | 8.4 mm |
| 2026-09-12 | 阵雨 | 23°/16° | 15.0 mm |
| 2026-09-13 | 毛毛雨 | 20°/17° | 7.1 mm |
| 2026-09-14 | 阵雨 | 21°/17° | 16.6 mm |
| 2026-09-15 | 阵雨 | 21°/16° | 5.2 mm |
| 2026-09-16 | 大毛毛雨 | 20°/15° | 4.6 mm |
| 2026-09-17 | 中阵雨 | 21°/15° | 16.0 mm |
| 2026-09-18 | 阵雨 | 22°/16° | 9.2 mm |
| 2026-09-19 | 中阵雨 | 23°/16° | 21.1 mm |
| 2026-09-20 | 中阵雨 | 25°/17° | 21.9 mm |
| 2026-09-21 | 强阵雨 | 22°/17° | 65.2 mm |
| 2026-09-22 | 中阵雨 | 23°/16° | 19.4 mm |
| 2026-09-23 | 阵雨 | 24°/16° | 8.3 mm |
| 2026-09-24 | 大毛毛雨 | 23°/16° | 6.5 mm |
| 2026-09-25 | 阵雨 | 22°/16° | 10.3 mm |
| 2026-09-26 | 中阵雨 | 24°/16° | 23.0 mm |
| 2026-09-27 | 强阵雨 | 24°/16° | 95.4 mm |
| 2026-09-28 | 阵雨 | 23°/16° | 6.8 mm |
| 2026-09-29 | 阵雨 | 23°/16° | 14.6 mm |
| 2026-09-30 | 雷阵雨 | 24°/16° | 27.6 mm |
2026年09月哥斯达黎加共记录 30 天，平均最高 22℃、最低 15℃，降水日 30 天。