Last updated: August 23, 2025
In December, the average temperature in Viljakkala, Finland hovers around -2°C (28°F), with extremes ranging from a chilly -20°C (-4°F) to a mild 5°C (42°F). Expect about 65 mm (2.5 in) of precipitation over 14 days, coupled with a high average humidity of 95%. Prepare for a cold and damp month!
In December in Viljakkala, the average temperature is -2°C (28°F), with maximums reaching 5°C (42°F) and minimums dropping as low as -20°C (-4°F). Travelers should be prepared for a range of temperatures and dress warmly to enjoy the winter scenery.
In Viljakkala in December, the precipitation amount is 65 mm (2.5 in) over a span of 14 days.
In Viljakkala in December humidity is 95%. With an average temperature of -2°C (28°F), this humidity feels like a damp, frigid chill that seeps into your bones, making traveling uncomfortable and the air heavy with a biting cold that dampens your spirits.
In Viljakkala 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 Viljakkala.
UV Risk Categories
Weather in Viljakkala varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Viljakkala, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 46 mm (1.8 inches) | 97% | low |
| February Weather | -5°C (23°F) | 42 mm (1.6 inches) | 95% | low |
| March Weather | -2°C (29°F) | 45 mm (1.8 inches) | 93% | moderate |
| April Weather | 3°C (37°F) | 44 mm (1.7 inches) | 86% | moderate |
| May Weather | 9°C (49°F) | 52 mm (2.0 inches) | 75% | moderate |
| June Weather | 16°C (61°F) | 68 mm (2.7 inches) | 75% | high |
| July Weather | 17°C (63°F) | 65 mm (2.6 inches) | 80% | high |
| August Weather | 15°C (60°F) | 93 mm (3.7 inches) | 83% | moderate |
| September Weather | 11°C (51°F) | 67 mm (2.6 inches) | 90% | moderate |
| October Weather | 6°C (42°F) | 78 mm (3.1 inches) | 93% | low |
| November Weather | 2°C (35°F) | 63 mm (2.5 inches) | 94% | low |
| December Weather | -2°C (28°F) | 65 mm (2.5 inches) | 95% | low |