Helsinki
December
Weather in Helsinki for December 2025
Your guide to Helsinki weather in December - trends and predictions
Pedestrian Weather Warning - See hour by hour.
Helsinki is transformed into a snow paradise in December, with more than 20 snowy days on average.
According to Helsinki snow forecast for December 2025, no snow is expected until the end of the month.So far, December 2025 in Helsinki shows a warmer trend than usual by 4.8 °C.
The forecast for the upcoming days in Helsinki predicts a temperature of 3.4 °C, which is slightly above the historical average.
In general, the average temperature in Helsinki at the beginning of December is -0.3 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 1.9 °C by the end of December.
Official Weather Alert ⚠️
Snow Forecast ❄️
Temperatures
4
Dry days
2
Rainy days
25
Snow days
0°/-4°
Temperatures
21 km/h
Avg max wind
88 %
Avg humidity
Helsinki Weather December
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Temperatures trend during December in Helsinki
See the weather trend as well as the moving average line
December weather in Helsinki day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. |  Partly cloudy | 2° /-2° | 1.2 mm | 0.1 cm | |
| 2 Dec. |  Patchy rain possible | 0° /-3° | 0.3 mm | 0 cm | |
| 3 Dec. |  Overcast | 0° /-4° | 1.8 mm | 0.5 cm | |
| 4 Dec. |  Cloudy | -2° /-5° | 0 mm | 0 cm | |
| 5 Dec. | Partly cloudy | -1° /-6° | 1.1 mm | 0.8 cm | |
| 6 Dec. | Overcast | 0° /-3° | 2.3 mm | 0.3 cm | |
| 7 Dec. | Partly cloudy | -1° /-4° | 2.4 mm | 0.7 cm | |
| 8 Dec. | Partly cloudy | -1° /-4° | 1.9 mm | 0.4 cm | |
| 9 Dec. | Partly cloudy | -1° /-4° | 1 mm | 0.2 cm | |
| 10 Dec. |  Patchy moderate snow | 1° /-3° | 3.3 mm | 1.4 cm | |
| 11 Dec. | Overcast | 2° /-2° | 2.4 mm | 0.9 cm | |
| 12 Dec. |  Light freezing rain | 0° /-3° | 2.5 mm | 1.5 cm | |
| 13 Dec. | Overcast | -1° /-5° | 1.3 mm | 0.5 cm | |
| 14 Dec. |  Heavy snow | -1° /-5° | 6.6 mm | 2.6 cm | |
| 15 Dec. | Patchy rain possible | 5° /2° | 2.3 mm | 0 cm | |
| 16 Dec. | Patchy rain possible | 6° /4° | 0.2 mm | 0 cm | |
| 17 Dec. | Patchy rain possible | 5° /4° | 2.6 mm | 0 cm | |
| 18 Dec. | Patchy rain possible | 5° /3° | 0.8 mm | 0 cm | |
| 19 Dec. | Patchy rain possible | 5° /3° | 0 mm | 0 cm | |
| 20 Dec. | Patchy rain possible | 5° /5° | 0.4 mm | 0 cm | |
| 21 Dec. | Partly cloudy | 3° /2° | 0 mm | 0 cm | |
| 22 Dec. | Partly cloudy | 4° /2° | 0 mm | 0 cm | |
| 23 Dec. |  Sunny | 1° /1° | 0 mm | 0 cm | |
| 24 Dec. | Sunny | 1° /0° | 0 mm | 0 cm | |
| 25 Dec. | Sunny | 1° /0° | 0 mm | 0 cm | |
| 26 Dec. | Partly cloudy | 3° /1° | 0 mm | 0 cm | |
| 27 Dec. | Partly cloudy | 3° /0° | 0 mm | 0 cm | |
| 28 Dec. | Light freezing rain | 1° /-1° | 0.1 mm | 0 cm | |
| 29 Dec. | Light freezing rain | 2° /-2° | 5.1 mm | 1.8 cm | |
| 30 Dec. |  Heavy rain at times | 3° /-2° | 5.9 mm | 1.1 cm | |
| 31 Dec. | Patchy rain possible | 0° /-4° | 1.7 mm | 0.1 cm | |
| Next | |||||
Important Notice
Our weather forecast for Helsinki in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Helsinki forecast closer to your planned date for the most up-to-date weather information.
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Helsinki in December - FAQ
What are the expected maximum and minimum temperatures in Helsinki during December?
Brace for cold days with temperatures not exceeding 0° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Helsinki during December?
Moderate rainfall is anticipated in Helsinki during December, with a total of 66.4 mm spread over approximately 2 days. Considering plans for rainy days is advisable.
Will it snow in Helsinki in December 2025?
Helsinki experiences an average snowfall of 21.1715 cm during December, occurring over 25 days.
What are the typical wind conditions in Helsinki during December?
The average wind speed in Helsinki during December is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
Helsinki snow forecast December 2025
Track daily snowfall levels and discover Helsinki’s snowy potential this December ❄️
On average, Helsinki sees 25 snowy days during December, with approximately 21.2 cm of total snowfall.
December rainfall patterns in Helsinki
Explore the daily rainfall trends and prepare for Helsinkis December weather 💧
Typically, Helsinki has 2 rainy days in December with a total of 66.4 mm of rainfall.
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