Helsinki in december: average Weather, Temperature and Climate
Weather in Helsinki in december 2026
The weather in Helsinki in december comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
very bad weather 357.2cm
Weather at 6am
32°F
Snow showers
40% of time
23%
13%
12%
Weather at 12pm
34°F
Snow showers
41% of time
23%
15%
11%
Weather at 6pm
32°F
Snow showers
38% of time
26%
13%
11%
Weather at 3am
32°F
41%
18%
14%
13%
Evolution of daily average temperature and precipitation in Helsinki in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Helsinki in december.
The climate of Helsinki in december is very bad
In december in Helsinki, the climate is wet (with 3.7in of precipitation over 7 days). Unfortunately, the weather conditions is worsening than the previous month since in november there is an average of 3.7in of rainfall over 6 days.
The climate is rather cold in that locality this month. Plan to cover you well! The high seasonal norm is 36°F. The seasonal minimum is 31°F. Thus, the mean temperature average on this month of december in Helsinki is 32°F. Note that these seasonal averages are in contrast with those observed in Helsinki in the month of december with a maximum record of 49°F in 2015 and a minimum record of 4°F in 2010. You can expect to have about 17 days with temperatures below 32°F, or 55% of time.
Day length in Helsinki in december is 05:53. Sunrise is at 09:19 and sunset is at 15:12.
Seasonal average climate and temperature of Helsinki in december
Check below seasonal norms These statistics are generated from the weather statements earlier years of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 32°F | ||||
| Highest temperature | 36°F | ||||
| Lowest temperature | 31°F | ||||
| Highest record temperature | 49°F (2015) | ||||
| Lowest record temperature | 4°F (2010) | ||||
| Number of days at -32°F | 17 day(s) (55%) | ||||
| Sea temperature | |||||
| Average sea temperature | 40°F | ||||
| Lowest sea temperature | 32°F | ||||
| Highest sea temperature | 47°F | ||||
| Wind | |||||
| Wind speed | 25km/h | ||||
| Wind temperature | 22°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.7in | ||||
| Number of days with rainfall | 7 day(s) (23%) | ||||
| Record daily rainfall | 1.3in (2017) | ||||
| Snowfall | 357.2cm | ||||
| Other climate data | |||||
| Humidity | 90% | ||||
| Visibility | 7.36km | ||||
| Cloud cover | 74% | ||||
| UV index | 2 | ||||
| Daily sunshine hours | 3 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 09:19 | ||||
| Time of sunset | 15:12 | ||||
| Length of day | 05:53 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last december?
Here is the day by day recorded weather in Helsinki in december 2025:
41°F to 43°F
41°F to 43°F
40°F to 41°F
40°F to 41°F
41°F to 41°F
40°F to 41°F
40°F to 41°F
36°F to 40°F
41°F to 43°F
38°F to 45°F
43°F to 45°F
29°F to 38°F
25°F to 31°F
31°F to 38°F
36°F to 41°F
41°F to 43°F
41°F to 43°F
36°F to 41°F
41°F to 43°F
41°F to 43°F
36°F to 41°F
29°F to 34°F
23°F to 25°F
27°F to 29°F
36°F to 43°F
36°F to 41°F
36°F to 40°F
29°F to 34°F
27°F to 34°F
23°F to 27°F
18°F to 22°F
Map: other cities in Finland in december
Cities near Helsinki:
| Vantaa in december | very bad weather |
| Kirkkonummi in december | very bad weather |
| Porvoo in december | very bad weather |
| Lohja in december | very bad weather |
| Ingå in december | very bad weather |
| Mäntsälä in december | very bad weather |
| Riihimäki in december | very bad weather |
| Ekenäs in december | very bad weather |
| Hämeenlinna in december | very bad weather |
| Lahti in december | very bad weather |
| Forssa in december | very bad weather |
| Salo in december | very bad weather |
Click over cities on the map for information about the weather in december.
Helsinki
perfect weather
good
tolerable
bad
very bad
Weather data for Helsinki in december:
Weather data for Helsinki for december are derived from an average of the weather forecast since 2009 in Helsinki. There is a margin of error and these forecasts are to be considered as general information only. The weather in Helsinki can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Helsinki.