December weather forecastHanko, Finland
December
Weather in December
December welcomes a freezing winter in full force in Hanko. The city is hurled into sub-zero conditions with sea temperatures averaging around 4.3°C (39.7°F). The limited daylight confines most of the city's activity indoors, inducing a sense of hibernation. Hanko adorns a snowy blanket enhancing the magical holiday season. As the year-end approaches, a crisp winter chill becomes an integral part of the city's festive charm.Sea temperature
In December, the average sea temperature is 4.3°C (39.7°F).Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.
Daylight
December has the shortest days of the year, with an average of 6h and 6min of daylight.On the first day of December in Hanko, sunrise is at 09:02 and sunset at 15:32. On the last day of the month, sunrise is at 09:28 and sunset at 15:33 EET.
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 Hanko, in December, the average water temperature is 4.3°C (39.7°F). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.
The month with the shortest days is December, with an average of 6h and 6min of daylight.
In Hanko, Finland, the average day length in December is 6h and 5min.
On the first day of December in Hanko, Finland, sunrise is at 09:02 and sunset at 15:32. On the last day of the month, sunrise is at 09:28 and sunset at 15:33 EET.
Average sea temperature in December
Hanko, Finland
- Average sea temperature in December: 4.3°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 December
Hanko, Finland
- Average daylight in December: 6h and 6min
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).
