Last updated: August 23, 2025
In December, the average temperature in Gromacnik, Croatia hovers around 3°C (38°F). Expect chilly days, with minimum temperatures potentially dipping to -10°C (15°F), while the mercury can rise to a maximum of 18°C (65°F). Be prepared for some rain too, with an average precipitation of 71 mm (2.8 in) spread over 10 days, coupled with a high humidity level of 89%.
In December in Gromacnik, the average temperature is 3°C (38°F). Maximums can reach 18°C (65°F), and minimums can be as low as -10°C (15°F). Be prepared for a range of temperatures when traveling, from chilly days to unexpectedly warm spells.
In Gromacnik in December, the precipitation amount is 71 mm (2.8 in) over a duration of 10 days.
In Gromacnik in December, humidity is 89%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapping around you, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cold and clammy.
In Gromacnik 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 Gromacnik, you can visit Hourly UV Index in Gromacnik.
UV Risk Categories
Weather in Gromacnik varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Gromacnik, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 47 mm (1.8 inches) | 89% | low |
| February Weather | 4°C (40°F) | 64 mm (2.5 inches) | 84% | moderate |
| March Weather | 7°C (45°F) | 57 mm (2.2 inches) | 77% | moderate |
| April Weather | 12°C (54°F) | 62 mm (2.4 inches) | 70% | high |
| May Weather | 17°C (62°F) | 101 mm (4.0 inches) | 70% | very high |
| June Weather | 22°C (71°F) | 79 mm (3.1 inches) | 68% | very high |
| July Weather | 23°C (74°F) | 81 mm (3.2 inches) | 63% | very high |
| August Weather | 23°C (74°F) | 60 mm (2.4 inches) | 52% | very high |
| September Weather | 18°C (65°F) | 48 mm (1.9 inches) | 61% | high |
| October Weather | 13°C (55°F) | 67 mm (2.7 inches) | 81% | moderate |
| November Weather | 8°C (46°F) | 52 mm (2.0 inches) | 86% | moderate |
| December Weather | 3°C (38°F) | 71 mm (2.8 inches) | 89% | low |