Hanko Weather in December
December in Hanko brings low temperatures, with highs of 4°C (39°F) and nights dropping to 0°C (32°F). Rainfall is on the higher side this month, averaging around 77 mm (3 in), so keep a rain jacket handy.
Rainfall in Hanko in December
Looking at the last 30 years, the data shows about 19 days with rain, averaging 77 mm (3 in) for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Hanko in December
Expect highs of 4°C (39°F) in Hanko in December, with nights dropping to around 0°C (32°F). Time outdoors is usually more comfortable with proper winter clothing and protection from wind. With lows around 0°C (32°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. With the coldest weather of the year, this month demands extra warmth. Be sure to layer up to stay comfortable.December in Hanko can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Hanko's climate page.
Hanko Temperature in December
Min Temperature
0°C (32°F)
Max Temperature
4°C (39°F)
Chance of Rain
64%
Precipitation
77 mm (3 in)
Rainy days
19 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hanko typically stay consistent throughout December, with daily highs averaging around 4°C (39°F). Nights are very cold, with lows typically ranging from -3°C (27°F) to 0°C (32°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Hanko in December
Browse day-by-day weather records for Hanko spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hanko historical weather extremes in December
The extremes listed below come from historical weather data collected in Hanko from 1976 through 2025.
- Hanko recorded its highest December temperature of 9°C (48°F) on December 6, 2015.
Best Places in Finland in December
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Hanko in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days.What To Do in Hanko in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Hanko's climate page.
See the full Hanko climate overview or explore weather in Finland.
