Last updated: August 27, 2025
In December, the average temperature in Siedlec, Poland hovers around 3°C (37°F). Visitors can expect a range that dips to a chilly -16°C (4°F) at its lowest and can reach up to 12°C (53°F) on warmer days. With an average precipitation of 47 mm (1.8 in) spread over 12 days, be prepared for some wet weather. Don't forget, the air tends to be quite damp, boasting an average humidity of 92%.
In December in Siedlec, the average temperature is 3°C (37°F). The maximum can reach 12°C (53°F), while the minimum can drop as low as -16°C (4°F). Be sure to pack warm layers if you're planning to visit during this time!
In Siedlec in December, the precipitation amount is 47 mm (1.8 in) over a period of 12 days.
In Siedlec in December humidity is 92%. With an average temperature of 3°C (37°F), this humidity feels like a heavy blanket that clings to your skin, making every step feel laborious and the cold air seem even more biting, a challenging environment for traveling.
In Siedlec 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 Siedlec.
UV Risk Categories
Weather in Siedlec varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Siedlec, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 48 mm (1.9 inches) | 90% | low |
| February Weather | 2°C (36°F) | 44 mm (1.7 inches) | 90% | low |
| March Weather | 5°C (41°F) | 44 mm (1.7 inches) | 87% | moderate |
| April Weather | 9°C (49°F) | 32 mm (1.3 inches) | 80% | moderate |
| May Weather | 14°C (57°F) | 62 mm (2.4 inches) | 67% | high |
| June Weather | 20°C (68°F) | 47 mm (1.8 inches) | 67% | very high |
| July Weather | 20°C (68°F) | 83 mm (3.3 inches) | 67% | very high |
| August Weather | 20°C (69°F) | 60 mm (2.4 inches) | 67% | high |
| September Weather | 15°C (60°F) | 57 mm (2.2 inches) | 78% | high |
| October Weather | 11°C (52°F) | 59 mm (2.3 inches) | 84% | moderate |
| November Weather | 6°C (43°F) | 39 mm (1.5 inches) | 89% | low |
| December Weather | 3°C (37°F) | 47 mm (1.8 inches) | 92% | low |