Last updated: August 22, 2025
In December, the average temperature in Opan, Bulgaria hovers around 5°C (42°F). Expect a chill, as the minimum can drop to -6°C (22°F), while the mercury can peak at a mild 19°C (67°F). Be prepared for some rain, with an average precipitation of 77 mm (3.0 in) spread across 10 days. Don't forget your umbrella, as the average humidity sits at a high 87%!
In December in Opan, the average temperature is 5°C (42°F). The maximum can reach 19°C (67°F), and the minimum can be as low as -6°C (22°F). It's advisable to pack layers and prepare for a range of weather conditions if you're planning to travel during this time.
In Opan in December, the total precipitation amount is 77 mm (3.0 in) spread over a duration of 10 days.
In Opan in December humidity is 87%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel less inviting as the air becomes heavy and oppressive.
In Opan 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 Opan, you can visit Hourly UV Index in Opan.
UV Risk Categories
Weather in Opan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Opan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (36°F) | 47 mm (1.8 inches) | 88% | low |
| February Weather | 5°C (42°F) | 43 mm (1.7 inches) | 84% | moderate |
| March Weather | 8°C (47°F) | 63 mm (2.5 inches) | 81% | high |
| April Weather | 13°C (55°F) | 42 mm (1.7 inches) | 70% | very high |
| May Weather | 19°C (66°F) | 52 mm (2.0 inches) | 72% | very high |
| June Weather | 22°C (72°F) | 92 mm (3.6 inches) | 66% | very high |
| July Weather | 26°C (78°F) | 48 mm (1.9 inches) | 62% | very high |
| August Weather | 26°C (80°F) | 17 mm (0.7 inches) | 48% | very high |
| September Weather | 22°C (71°F) | 18 mm (0.7 inches) | 58% | high |
| October Weather | 15°C (59°F) | 73 mm (2.9 inches) | 78% | high |
| November Weather | 10°C (49°F) | 60 mm (2.4 inches) | 85% | moderate |
| December Weather | 5°C (42°F) | 77 mm (3.0 inches) | 87% | low |