Last updated: August 23, 2025
In Hrvatska Kostajnica, Croatia, the average temperature in September hovers around 18°C (64°F), with a minimum dipping to 2°C (35°F) and soaring to a maximum of 35°C (95°F). Expect approximately 96 mm (3.8 in) of precipitation spread over 8 days during this month, along with an average humidity level of 62%. Prepare for a varied climate that can surprise and delight!
In September in Hrvatska Kostajnica, the average temperature is 18°C (64°F). The maximum can reach 35°C (95°F), while the minimum can drop as low as 2°C (35°F). This makes Hrvatska Kostajnica an ideal destination for travelers who enjoy mild weather with the possibility of warm days and cool evenings.
In Hrvatska Kostajnica in September, the precipitation amount is 96 mm (3.8 in) over the course of 8 days.
In Hrvatska Kostajnica in September humidity is 62%. With an average temperature of 18°C (64°F), this humidity feels like a warm yet refreshing embrace, making it quite pleasant for traveling as long as you stay hydrated and take breaks in the shade.
In Hrvatska Kostajnica in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the 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 September’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 |