Last updated: August 27, 2025
In Undersaker, Sweden, the average temperature in December hovers around -5°C (24°F), with extremes ranging from a biting -22°C (-7°F) to a milder 5°C (42°F). Expect 65 mm (2.6 in) of precipitation spread over 16 days, contributing to a notably high average humidity of 100%. Stay prepared for a chilly and damp atmosphere!
In December in Undersaker, the average temperature is -5°C (24°F). Maximums can reach 5°C (42°F), and minimums can be as low as -22°C (-7°F). Travelers should be prepared for very cold conditions and dress warmly to fully enjoy their visit.
In Undersaker in December, the precipitation amount is 65 mm (2.6 in), occurring over a span of 16 days.
In Undersaker in December humidity is 100%. With an average temperature of -5°C (24°F), this humidity feels like a biting chill that seeps through your layers, making every breath a challenge and turning your travels into an experience of freezing discomfort and breathless wonder.
In Undersaker 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 Undersaker.
UV Risk Categories
Weather in Undersaker varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Undersaker, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 61 mm (2.4 inches) | 99% | low |
| February Weather | -6°C (21°F) | 42 mm (1.7 inches) | 97% | low |
| March Weather | -3°C (26°F) | 68 mm (2.7 inches) | 94% | moderate |
| April Weather | 0°C (32°F) | 51 mm (2.0 inches) | 89% | moderate |
| May Weather | 5°C (42°F) | 55 mm (2.2 inches) | 86% | moderate |
| June Weather | 11°C (53°F) | 83 mm (3.3 inches) | 81% | high |
| July Weather | 13°C (56°F) | 100 mm (3.9 inches) | 82% | high |
| August Weather | 11°C (53°F) | 103 mm (4.1 inches) | 90% | moderate |
| September Weather | 7°C (45°F) | 90 mm (3.5 inches) | 92% | moderate |
| October Weather | 3°C (37°F) | 86 mm (3.4 inches) | 95% | low |
| November Weather | -2°C (28°F) | 59 mm (2.3 inches) | 98% | low |
| December Weather | -5°C (24°F) | 65 mm (2.6 inches) | 100% | low |