Search for cities, countries, lakes and rivers
Sea Temperature in Helsinki in December
Complete information on the sea temperature range in the Gulf of Finland in Helsinki in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Helsinki. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Helsinki in December
-1°C
MINIMUN
3.5°C
AVERAGE
8°C
MAXIMUM
Historical Data of Water Temperature in December in Helsinki
Water Temperature Chart for Gulf of Finland in Helsinki in December
Sea Temperature Table in Helsinki in December Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Dec 1 | 6°C | 5°C | 5°C | 5.5°C |
| Dec 2 | 6°C | 5°C | 6°C | 5.8°C |
| Dec 3 | 6°C | 5°C | 6°C | 5.5°C |
| Dec 4 | 6°C | 5°C | 6°C | 5.5°C |
| Dec 5 | 7°C | 5°C | 6°C | 5.8°C |
| Dec 6 | 6°C | 5°C | 5°C | 5.0°C |
| Dec 7 | 6°C | 5°C | 5°C | 5.3°C |
| Dec 8 | 6°C | 6°C | 5°C | 5.5°C |
| Dec 9 | 6°C | 6°C | 5°C | 5.5°C |
| Dec 10 | 6°C | 4°C | 5°C | 4.5°C |
| Dec 11 | 6°C | 5°C | 5°C | 5.0°C |
| Dec 12 | 6°C | 4°C | 4°C | 4.3°C |
| Dec 13 | 6°C | 4°C | 4°C | 4.3°C |
| Dec 14 | 6°C | 4°C | 4°C | 4.3°C |
| Dec 15 | 5°C | 4°C | 4°C | 4.0°C |
| Dec 16 | 5°C | 4°C | 4°C | 4.0°C |
| Dec 17 | 5°C | 3°C | 3°C | 3.5°C |
| Dec 18 | 5°C | 3°C | 4°C | 3.8°C |
| Dec 19 | 5°C | 3°C | 3°C | 3.3°C |
| Dec 20 | 5°C | 3°C | 3°C | 3.5°C |
| Dec 21 | 5°C | 3°C | 3°C | 3.5°C |
| Dec 22 | 5°C | 3°C | 3°C | 3.5°C |
| Dec 23 | 5°C | 3°C | 3°C | 3.3°C |
| Dec 24 | 5°C | 3°C | 3°C | 3.3°C |
| Dec 25 | 4°C | 3°C | 3°C | 3.0°C |
| Dec 26 | 4°C | 3°C | 3°C | 3.0°C |
| Dec 27 | 4°C | 2°C | 3°C | 2.8°C |
| Dec 28 | 4°C | 2°C | 3°C | 2.8°C |
| Dec 29 | 4°C | 2°C | 3°C | 2.8°C |
| Dec 30 | 2°C | 2°C | 3°C | 2.3°C |
Helsinki Climate and Swimming Opportunities in December
-2°C
Average Day Air Temperature
-5°C
Average Night Air Temperature
55 mm
Precipitation Amount per Month
13 days
Number of Rainy Days
6 hrs
Daylight
per Day
1 hrs
Sunshine
per Day
16 km/h
Average Wind Speed
88%
Average
humidity
Helsinki lies within the Southern Finland Province in Finland. The average daytime temperature in Helsinki in December is -2°C (28°F), while the nighttime average is -5°C (24°F). There are typically 13 rainy days during the month, with a total precipitation of 55 mm (2.2 inches). The daylight duration in December in Helsinki is 6 hours, with an average of 1 hours of sunshine per day. The average wind speed in December is 16 km/h (10 mph), and the humidity level is around 88%.
The water temperature in Helsinki in December ranges from 2°C to 5°C (36°F to 41°F). At the beginning of the month, the average temperature is around 5°C (41°F), shifting to 4°C (39°F) by mid-December and reaching 3°C (37°F) in the last ten days. Overall, the average sea temperature in Helsinki for December is 4°C (39°F). Swimming in such conditions is extremely dangerous due to the risk of hypothermia and cold shock. Only experienced winter swimmers with proper preparation should attempt it.
Sea Temperature in December in Nearby Cities
Frequently Asked Questions About Water Temperatures in December in Helsinki
What is the sea temperature in Helsinki in December?
The water temperature in the Gulf of Finland in Helsinki in December ranges from 2°C to 5°C (36°F to 41°F).
Is it possible to swim in the Gulf of Finland in Helsinki in December?
The average sea temperature in Helsinki in December is 4°C (39°F), and the air temperature is -2°C (28°F), so swimming in such conditions is extremely dangerous due to the risk of hypothermia and cold shock. Only experienced winter swimmers with proper preparation should attempt it.