Weather in September
September witnesses a crisp transition from warm summer to cooler autumn in Hanko. The average sea temperature plunges to around 14.9°C (58.8°F) indicating the onset of fall. The shrinking daylight hours are a gentle reminder of the approaching colder months. However, September in Hanko plays host to an enchanting display of autumnal colors, making a stroll in the city a visual treat. As the city bids adieu to summer, it prepares for the gentle embrace of autumn.
Note: Beware of 14.9°C (58.8°F) waters at 13°C (55.4°F), they're uninviting, and a dip below 10°C (50°F) has risks of breath loss and cold shock, contingent on health.
On the first day of September, sunrise is at 06:24 and sunset at 20:31. On the last day of the month, sunrise is at 07:32 and sunset at 19:03 EEST.
[Resources]Sea temperature
In September, the average sea temperature is 14.9°C (58.8°F).Note: Beware of 14.9°C (58.8°F) waters at 13°C (55.4°F), they're uninviting, and a dip below 10°C (50°F) has risks of breath loss and cold shock, contingent on health.
Daylight
In September, the average length of the day is 12h and 52min.On the first day of September, sunrise is at 06:24 and sunset at 20:31. On the last day of the month, sunrise is at 07:32 and sunset at 19:03 EEST.
Frequently asked questions
What is the water temperature in September in Hanko?
In Hanko, the average seawater temperature in September is 14.9°C (58.8°F). Swimming in 14.9°C (58.8°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
How many hours of daylight does Hanko have in September?
In Hanko, the average day length in September is 12h and 52min.
When is the sunrise / sunset in September in Hanko?
In September, on the first day of the month, sunrise is at 06:24 and sunset at 20:31. On the last day of the month, sunrise is at 07:32 and sunset at 19:03 EEST.
Average sea temperature in September
Hanko, Finland
- Average sea temperature in September: 14.9°C
The best month for swimming (with the highest average sea temperature) is August (17.8°C).
The coldest month (with the lowest average sea temperature) is March (0.3°C).
Average daylight in September
Hanko, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
Hanko, Finland
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
