Last updated: August 27, 2025
In December, the average temperature in Sim, Russian Federation hovers around -10°C (14°F). During this chilly month, temperatures can plummet as low as -29°C (-19°F), while the maximum can reach up to 5°C (41°F). Expect 37 mm (1.4 in) of precipitation spread across about 9 days, with an average humidity level of a brisk 93%.
In December in Sim, the average temperature is -10°C (14°F), with maximums reaching 5°C (41°F) and minimums dropping as low as -29°C (-19°F). Travelers should be prepared for extremely cold weather and dress in warm layers for outdoor activities.
In Sim in December, the total precipitation amount is 37 mm (1.4 in) spread across 9 days.
In Sim in December, humidity is 93%. With an average temperature of -10°C (14°F), this humidity feels like an invisible weight on your skin, making every breath feel thick and heavy, while the cold air bites sharply, creating a contrasting and uncomfortable chill that can make traveling outdoors feel like a daunting challenge.
In Sim 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 Sim.
UV Risk Categories
Weather in Sim varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sim, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -12°C (11°F) | 47 mm (1.9 inches) | 98% | low |
| February Weather | -10°C (14°F) | 51 mm (2.0 inches) | 96% | low |
| March Weather | -5°C (23°F) | 51 mm (2.0 inches) | 96% | moderate |
| April Weather | 4°C (39°F) | 50 mm (2.0 inches) | 90% | moderate |
| May Weather | 12°C (53°F) | 54 mm (2.1 inches) | 73% | high |
| June Weather | 15°C (59°F) | 86 mm (3.4 inches) | 68% | high |
| July Weather | 19°C (66°F) | 105 mm (4.1 inches) | 75% | high |
| August Weather | 17°C (62°F) | 88 mm (3.5 inches) | 73% | high |
| September Weather | 9°C (49°F) | 83 mm (3.3 inches) | 84% | moderate |
| October Weather | 4°C (39°F) | 69 mm (2.7 inches) | 89% | moderate |
| November Weather | -5°C (24°F) | 54 mm (2.1 inches) | 94% | low |
| December Weather | -10°C (14°F) | 37 mm (1.4 inches) | 93% | low |