Last updated: August 23, 2025
In December, the average temperature in Kauniainen, Finland hovers around -1°C (31°F). Minimum temperatures can drop to an icy -17°C (1°F), while the maximum can reach a brisk 7°C (44°F). Expect 74 mm (2.9 in) of precipitation spread over 15 days, contributing to a high average humidity of 95%.
In December in Kauniainen, the average temperature is -1°C (31°F). The maximum can reach 7°C (44°F) and the minimum can be as low as -17°C (1°F). Be prepared for cold weather and pack accordingly to ensure a comfortable visit.
In Kauniainen in December, the precipitation amount is 74 mm (2.9 in) over the course of 15 days.
In Kauniainen in December, humidity is 95%. With an average temperature of -1°C (31°F), this humidity feels like an icy weight on your skin, making travel uncomfortable and every breath a challenge as the cold dampness clings to your clothes.
In Kauniainen in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Kauniainen.
UV Risk Categories
Weather in Kauniainen varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Kauniainen, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (28°F) | 56 mm (2.2 inches) | 97% | low |
| February Weather | -3°C (26°F) | 48 mm (1.9 inches) | 95% | low |
| March Weather | -1°C (31°F) | 53 mm (2.1 inches) | 93% | moderate |
| April Weather | 4°C (39°F) | 45 mm (1.8 inches) | 86% | moderate |
| May Weather | 10°C (50°F) | 54 mm (2.1 inches) | 75% | moderate |
| June Weather | 16°C (61°F) | 55 mm (2.2 inches) | 75% | high |
| July Weather | 18°C (64°F) | 84 mm (3.3 inches) | 80% | high |
| August Weather | 16°C (62°F) | 77 mm (3.0 inches) | 83% | moderate |
| September Weather | 12°C (54°F) | 71 mm (2.8 inches) | 90% | moderate |
| October Weather | 7°C (45°F) | 88 mm (3.5 inches) | 93% | low |
| November Weather | 3°C (38°F) | 63 mm (2.5 inches) | 94% | low |
| December Weather | -1°C (31°F) | 74 mm (2.9 inches) | 95% | low |