| 日期 | 天气 | 高/低 | 降水 |
|---|---|---|---|
| 2026-09-01 | 小毛毛雨 | 20°/13° | 0.6 mm |
| 2026-09-02 | 小毛毛雨 | 20°/10° | 0.3 mm |
| 2026-09-03 | 阴 | 18°/9° | 0.0 mm |
| 2026-09-04 | 小毛毛雨 | 19°/9° | 0.8 mm |
| 2026-09-05 | 阴 | 18°/8° | 0.0 mm |
| 2026-09-06 | 阴 | 16°/8° | 0.0 mm |
| 2026-09-07 | 阴 | 17°/4° | 0.0 mm |
| 2026-09-08 | 毛毛雨 | 17°/14° | 2.1 mm |
| 2026-09-09 | 阵雨 | 16°/14° | 5.0 mm |
| 2026-09-10 | 阵雨 | 17°/11° | 10.6 mm |
| 2026-09-11 | 小毛毛雨 | 17°/8° | 0.2 mm |
| 2026-09-12 | 阴 | 15°/7° | 0.0 mm |
| 2026-09-13 | 小毛毛雨 | 15°/10° | 1.0 mm |
| 2026-09-14 | 多云 | 16°/6° | 0.0 mm |
| 2026-09-15 | 阴 | 16°/7° | 0.0 mm |
| 2026-09-16 | 小雨 | 14°/11° | 10.4 mm |
| 2026-09-17 | 毛毛雨 | 16°/10° | 2.5 mm |
| 2026-09-18 | 大毛毛雨 | 15°/10° | 4.4 mm |
| 2026-09-19 | 小毛毛雨 | 16°/11° | 2.0 mm |
| 2026-09-20 | 毛毛雨 | 16°/10° | 2.0 mm |
| 2026-09-21 | 毛毛雨 | 16°/8° | 2.5 mm |
| 2026-09-22 | 晴天 | 14°/7° | 0.0 mm |
| 2026-09-23 | 小毛毛雨 | 12°/7° | 0.2 mm |
| 2026-09-24 | 大雨 | 15°/7° | 11.3 mm |
| 2026-09-25 | 中阵雨 | 12°/11° | 16.3 mm |
| 2026-09-26 | 阵雨 | 14°/11° | 6.1 mm |
| 2026-09-27 | 小毛毛雨 | 15°/8° | 0.5 mm |
| 2026-09-28 | 阴 | 14°/8° | 0.0 mm |
| 2026-09-29 | 阴 | 15°/10° | 0.0 mm |
| 2026-09-30 | 阴 | 15°/8° | 0.0 mm |
2026年09月赫尔辛基共记录 30 天，平均最高 15℃、最低 9℃，降水日 19 天。