Last updated: August 23, 2025
In Hrvatska Kostajnica, Croatia, the average temperature in December hovers around 4°C (39°F). Expect a minimum chill of -8°C (19°F) and a maximum warmth of 19°C (66°F). With 88 mm (3.5 in) of precipitation spread over 11 days, you might want to keep an umbrella handy. Additionally, the air is quite humid, with average humidity at a notable 88%.
In December in Hrvatska Kostajnica, the average temperature is 4°C (39°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -8°C (19°F). Be sure to pack layers to comfortably enjoy the varied weather during your trip!
In Hrvatska Kostajnica in December, the total precipitation amount is 88 mm (3.5 in) spread over 11 days.
In Hrvatska Kostajnica in December, humidity is 88%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm.
In Hrvatska Kostajnica 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 Hrvatska Kostajnica, you can visit Hourly UV Index in Hrvatska Kostajnica.
UV Risk Categories
Weather in Hrvatska Kostajnica varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hrvatska Kostajnica, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (35°F) | 51 mm (2.0 inches) | 89% | low |
| February Weather | 5°C (41°F) | 70 mm (2.7 inches) | 83% | moderate |
| March Weather | 8°C (46°F) | 59 mm (2.3 inches) | 75% | moderate |
| April Weather | 12°C (54°F) | 78 mm (3.1 inches) | 72% | high |
| May Weather | 16°C (62°F) | 123 mm (4.8 inches) | 70% | very high |
| June Weather | 22°C (71°F) | 85 mm (3.3 inches) | 69% | very high |
| July Weather | 23°C (73°F) | 87 mm (3.4 inches) | 64% | very high |
| August Weather | 23°C (73°F) | 82 mm (3.2 inches) | 51% | very high |
| September Weather | 18°C (64°F) | 96 mm (3.8 inches) | 62% | high |
| October Weather | 13°C (55°F) | 90 mm (3.5 inches) | 81% | moderate |
| November Weather | 8°C (46°F) | 86 mm (3.4 inches) | 87% | moderate |
| December Weather | 4°C (39°F) | 88 mm (3.5 inches) | 88% | low |