Last updated: August 22, 2025
In December, the average temperature in Siroki Brijeg, Bosnia and Herzegovina hovers around 4°C (39°F). Temperatures can dip to a chilling -9°C (17°F) and rise to a mild 14°C (57°F). Expect 304 mm (12.0 in) of precipitation spread over 16 days, contributing to an average humidity of 81%. Be prepared for a mix of cool and wet conditions!
In December in Siroki Brijeg, the average temperature is 4°C (39°F). Maximums can reach 14°C (57°F), while minimums can drop as low as -9°C (17°F). Pack warm clothing and be prepared for chilly conditions if you're planning to travel during this time.
In Siroki Brijeg in December, the precipitation amount is 304 mm (12.0 in) spread over a period of 16 days.
In Siroki Brijeg in December, humidity is 81%. With an average temperature of 4°C (39°F), this humidity feels like a chilling dampness that penetrates even the warmest layers of clothing, making outdoor exploration uncomfortable and prompting travelers to seek refuge indoors.
In Siroki Brijeg 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 Siroki Brijeg, you can visit Hourly UV Index in Siroki Brijeg.
UV Risk Categories
Weather in Siroki Brijeg varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Siroki Brijeg, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 139 mm (5.5 inches) | 83% | low |
| February Weather | 4°C (40°F) | 187 mm (7.3 inches) | 76% | moderate |
| March Weather | 6°C (43°F) | 166 mm (6.5 inches) | 73% | high |
| April Weather | 10°C (51°F) | 125 mm (4.9 inches) | 75% | high |
| May Weather | 15°C (59°F) | 156 mm (6.1 inches) | 78% | very high |
| June Weather | 19°C (67°F) | 91 mm (3.6 inches) | 75% | very high |
| July Weather | 22°C (71°F) | 69 mm (2.7 inches) | 71% | very high |
| August Weather | 22°C (73°F) | 66 mm (2.6 inches) | 65% | very high |
| September Weather | 17°C (63°F) | 127 mm (5.0 inches) | 69% | high |
| October Weather | 12°C (54°F) | 163 mm (6.4 inches) | 76% | moderate |
| November Weather | 8°C (47°F) | 310 mm (12.2 inches) | 81% | moderate |
| December Weather | 4°C (39°F) | 304 mm (12.0 inches) | 81% | low |