Last updated: August 22, 2025
In December, the average temperature in Simitli, Bulgaria hovers around 3°C (38°F), with a chilly minimum of -12°C (11°F) and a mild maximum of 13°C (57°F). Expect about 98 mm (3.9 in) of precipitation over approximately 11 days, contributing to an average humidity level of 87%. Be prepared for a mix of temperature and weather conditions if you're planning a visit!
In December in Simitli, the average temperature is 3°C (38°F). Maximums can reach 13°C (57°F), and minimums can be as low as -12°C (11°F). Travelers should prepare for chilly conditions and pack accordingly to enjoy their trip.
In Simitli in December, the total precipitation amount is 98 mm (3.9 in) over the course of 11 days.
In Simitli in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Simitli in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Simitli, you can visit Hourly UV Index in Simitli.
UV Risk Categories
Weather in Simitli varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Simitli, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 63 mm (2.5 inches) | 88% | low |
| February Weather | 4°C (39°F) | 55 mm (2.2 inches) | 83% | moderate |
| March Weather | 6°C (43°F) | 93 mm (3.6 inches) | 81% | high |
| April Weather | 10°C (51°F) | 64 mm (2.5 inches) | 71% | very high |
| May Weather | 15°C (59°F) | 57 mm (2.3 inches) | 74% | very high |
| June Weather | 19°C (66°F) | 58 mm (2.3 inches) | 63% | very high |
| July Weather | 21°C (71°F) | 37 mm (1.4 inches) | 60% | very high |
| August Weather | 22°C (72°F) | 23 mm (0.9 inches) | 47% | very high |
| September Weather | 18°C (64°F) | 28 mm (1.1 inches) | 57% | very high |
| October Weather | 12°C (54°F) | 54 mm (2.1 inches) | 76% | high |
| November Weather | 7°C (46°F) | 53 mm (2.1 inches) | 85% | moderate |
| December Weather | 3°C (38°F) | 98 mm (3.9 inches) | 87% | low |