September weather in Helsinki, Finland
Averages from 150 days in September across 2020–2024.
Typical conditions
| Average high | 15.5°C |
|---|---|
| Average low | 10.2°C |
| Average mean | 12.9°C |
| Total precipitation | 348 mm |
| Rainy days | 92 |
| Average precipitation hours | 4.3 h |
| Average max wind speed | 21.9 km/h |
| Average sunshine | 8.6 h/day |
Explore other months
January February March April May June July August September October November December