Last updated: August 23, 2025
In Sonkajaervi, Finland, the average temperature in December hovers around -5°C (24°F), making it a chilly time of year. Expect the mercury to dip as low as -23°C (-8°F) and occasionally rise to a maximum of 4°C (39°F). During this month, precipitation averages 64 mm (2.5 in) across 16 days, contributing to the area's average humidity of 98%. Be prepared for a wet and brisk winter experience!
In December in Sonkajaervi, the average temperature is -5°C (24°F), with maximums reaching 4°C (39°F) and minimums dropping as low as -23°C (-8°F). Travelers should be prepared for cold weather and pack accordingly.
In Sonkajaervi in December, the precipitation amount is 64 mm (2.5 in) spread over 16 days.
In Sonkajaervi in December humidity is 98%. With an average temperature of -5°C (24°F), this humidity feels like an oppressive blanket, making every breath feel heavy and chilling your bones with the dampness, which can be quite uncomfortable for traveling.
In Sonkajaervi 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 Sonkajaervi.
UV Risk Categories
Weather in Sonkajaervi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sonkajaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (19°F) | 48 mm (1.9 inches) | 99% | low |
| February Weather | -8°C (18°F) | 45 mm (1.8 inches) | 97% | low |
| March Weather | -4°C (25°F) | 45 mm (1.8 inches) | 95% | low |
| April Weather | 1°C (35°F) | 45 mm (1.8 inches) | 87% | moderate |
| May Weather | 8°C (47°F) | 57 mm (2.2 inches) | 78% | moderate |
| June Weather | 15°C (59°F) | 73 mm (2.9 inches) | 74% | high |
| July Weather | 17°C (62°F) | 90 mm (3.5 inches) | 80% | high |
| August Weather | 14°C (58°F) | 102 mm (4.0 inches) | 85% | moderate |
| September Weather | 9°C (48°F) | 85 mm (3.3 inches) | 91% | moderate |
| October Weather | 4°C (39°F) | 89 mm (3.5 inches) | 95% | low |
| November Weather | -1°C (31°F) | 80 mm (3.1 inches) | 94% | low |
| December Weather | -5°C (24°F) | 64 mm (2.5 inches) | 98% | low |