Last updated: August 23, 2025
In December, the average temperature in Tohmajaervi, Finland hovers around -4°C (25°F), with highs reaching up to 4°C (39°F) and plunging as low as -26°C (-15°F). Expect substantial precipitation of 81 mm (3.2 in) over 16 days, accompanied by a high average humidity of 97%. Dress warmly and be prepared for a wet, chilly month!
In December in Tohmajaervi, the average temperature is -4°C (25°F), with maximums reaching 4°C (39°F) and minimums dropping as low as -26°C (-15°F). Be prepared for cold weather and pack accordingly if you're traveling during this time.
In Tohmajaervi in December, the precipitation amount is 81 mm (3.2 in), falling over the course of 16 days.
In Tohmajaervi in December, humidity is 97%. With an average temperature of -4°C (25°F), this humidity feels like a bite of frost in the air, making every breath feel heavy and icy, leaving travelers feeling chilled to the bone as they navigate through the damp surroundings.
In Tohmajaervi 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 Tohmajaervi.
UV Risk Categories
Weather in Tohmajaervi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tohmajaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 52 mm (2.0 inches) | 99% | low |
| February Weather | -7°C (19°F) | 55 mm (2.2 inches) | 98% | low |
| March Weather | -3°C (26°F) | 56 mm (2.2 inches) | 95% | moderate |
| April Weather | 2°C (36°F) | 48 mm (1.9 inches) | 88% | moderate |
| May Weather | 9°C (48°F) | 56 mm (2.2 inches) | 79% | moderate |
| June Weather | 15°C (60°F) | 58 mm (2.3 inches) | 76% | high |
| July Weather | 17°C (63°F) | 92 mm (3.6 inches) | 83% | high |
| August Weather | 15°C (59°F) | 105 mm (4.1 inches) | 89% | moderate |
| September Weather | 10°C (50°F) | 84 mm (3.3 inches) | 91% | moderate |
| October Weather | 5°C (41°F) | 86 mm (3.4 inches) | 95% | low |
| November Weather | 0°C (33°F) | 64 mm (2.5 inches) | 95% | low |
| December Weather | -4°C (25°F) | 81 mm (3.2 inches) | 97% | low |