September weather forecastPorvoo, Finland
September
Weather in September
September witnesses a drop in sea temperatures to 15.1°C (59.2°F), hinting at the onset of autumn. The changing season colours Porvoo's streets and parks in beautiful shades of orange and red. Despite the cooling weather, outdoor activities remain popular, particularly hiking and cycling. The fall-inspired menu in local restaurants and the weekend farmers' market are reminders of the fruitful harvest season.Sea temperature
In Porvoo, Finland, in September, the average water temperature is 15.1°C (59.2°F).Note: For most people, swimming in water at 15.1°C (59.2°F) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day is 12h and 53min.On the first day of the month, sunrise is at 06:12 and sunset at 20:21. On the last day of September, in Porvoo, sunrise is at 07:21 and sunset at 18:52 EEST.
Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Porvoo, Finland, in September, the average water temperature is 15.1°C (59.2°F). Swimming in 15.1°C (59.2°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).
The average day length in September is 12h and 53min.
In September, on the first day of the month, sunrise is at 06:12 and sunset at 20:21. On the last day of the month, sunrise is at 07:21 and sunset at 18:52 EEST.
Average sea temperature in September
Porvoo, Finland
- Average sea temperature in September: 15.1°C
The best months for swimming (with the highest average sea temperature) are July and August (18.7°C).
The coldest months (with the lowest average sea temperature) are February and March (-0.2°C).
Average daylight in September
Porvoo, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
