Last updated: March 17, 2025
In September, the weather in Karlovac, Croatia showcases a spectrum of experiences, with temperatures reaching a maximum of 34°C (93°F) and dipping to a daytime average of 17°C (63°F). The month is characterized by an intriguing blend of warmth and occasional chill, as minimum temperatures can fall to 3°C (38°F). Rainfall plays a significant role, with a total precipitation of 114 mm (4.5 in) spread across 11 days, contributing to a relative humidity level of 62%. This delightful transition into autumn offers a unique charm, making September an ideal time to explore the scenic beauty of Karlovac.
In September, Karlovac, Croatia, begins to transition from the sweltering summer to the milder embrace of autumn. With temperatures featuring a minimum of 3°C (38°F) and climbing to a pleasant maximum of 34°C (93°F), this month offers a delightful average of 17°C (63°F). As summer's heat begins to wane, visitors can enjoy comfortable days ideal for exploring the historic streets, while cooler evenings invite cozy gatherings. The gradual decrease in temperature signals the onset of a more temperate climate, making it a fantastic time to experience the natural beauty and cultural richness of this charming city.
In September, Karlovac, Croatia experiences a notable spike in precipitation, with an average of 114 mm (4.5 in) of rain falling over approximately 11 days. This increase marks a transition into the autumn season, as rainfall becomes more frequent compared to the preceding summer months, which averaged around 80 mm. Rising from the relatively dry months of July and August, September's precipitation helps rejuvenate the lush landscapes of the region. Notably, it stands out as one of the wetter months of the year, setting the stage for a shift in local weather patterns as the year winds down, making the vibrant colors of autumn even more striking against the backdrop of refreshing rainfall.
September in Karlovac, Croatia, marks a notable shift in humidity as summer gracefully gives way to autumn. With a humidity level of 62%, the air becomes noticeably crisper compared to the preceding months of July and August, which boasted much lower humidity at 64% and 51%, respectively. This dip reflects the gradual change from the warm and somewhat drier summer, hinting at the approaching wet season. As the year progresses, humidity levels rise again in October, reaching 81%, suggesting that September serves as a transitional month, where the air holds just enough moisture to prepare for the more humid months ahead. Thus, while September is drier than many earlier months, it foreshadows the return of the lush, vibrant atmosphere characteristic of the Croatian fall.
As summer transitions into autumn, September in Karlovac, Croatia sees a reduction in the UV Index, which drops to 6, indicating a high exposure category. This shift reflects a seasonal cooling trend, yet caution is still advised, with a burn time of just 25 minutes for unprotected skin. After months of extremely high values peaking at 9 in July and June, the September Index still emphasizes the importance of sun protection. Visitors can enjoy the pleasant weather while being mindful of UV exposure. Discover more about the monthly fluctuations in the UV Index and how to stay safe by visiting Karlovac UV Index.
UV Risk Categories
In Karlovac, Croatia, September marks the transition from the vibrant summer to the gentle touch of autumn, boasting an impressive 323 sunshine hours. This figure, while lower than the sun-drenched peak of July with its 424 hours, still highlights a significant abundance of daylight, reflecting the gradual tapering of summer's brilliance. As the days grow shorter, September retains a generous share of sunshine compared to the earlier months, surpassing even the sunlit days of March and April. This delightful balance of warmth and light makes September a charming time to explore the beauty of Karlovac, as the city basks in the last golden rays before the cooler months settle in.
In September, Karlovac, Croatia, enjoys a notable 55% chance of sunny weather, making it one of the more promising months for sunshine. This slight uptick in sunny days comes on the heels of the summer months, where July and August maintain a steady 50% chance. Interestingly, September's weather balances the declining sunlit days of October, which plummets to 36%. As the summer warmth lingers, the early days of autumn present a delightful opportunity for outdoor activities, showcasing the charm of Karlovac's landscapes bathed in sunlight. Overall, September stands out as a favorable time for those seeking to bask in the sun before the chill of winter sets in.
As summer relinquishes its grip in September, Karlovac experiences a gentle transition marked by 12 hours of daylight. This month showcases a notable decrease from the sun-drenched 15 hours of July and August, hinting at the approach of autumn. The gradual shortening of days continues a pattern observed since spring, where daylight steadily climbed from 9 hours in January to a peak in June. This rhythmic ebb and flow of sunlight not only paints the sky with deepening hues but also invites residents and visitors alike to relish the lingering warmth before the days grow shorter and the cooler months take hold.
In September, Karlovac experiences a gentle breeze with an average wind speed of 1.6 m/s (4 mph), mirroring the calmer conditions of the preceding summer months. As the summer warmth begins to wane, this slight dip in wind intensity continues the trend established from the slightly higher gusts seen in the spring. Turning towards autumn, the wind gradually picks up speed in October, reaching 2.0 m/s (5 mph), hinting at the more dynamic weather patterns that accompany the shift in seasons. Overall, September’s tranquil winds create a serene atmosphere, perfect for enjoying the natural beauty of this Croatian gem as it transitions into fall.
The weather in Karlovac changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Karlovac and find detailed weather information for every month.
September and January present distinctly different weather patterns. In September, temperatures range from a chilly 3°C (38°F) at night to a warm 34°C (93°F) during the day, with an average of 17°C (63°F). The month sees about 114 mm (4.5 in) of precipitation across 11 days and maintains a humidity level of 62%. In contrast, January is much colder, with temperatures dipping as low as -16°C (3°F) and only reaching a maximum of 16°C (61°F), averaging just 1°C (34°F). This month experiences less precipitation, totaling 55 mm (2.1 in) over 10 days, but the humidity rises significantly to 89%, contributing to a distinctly frigid atmosphere. For more details on the conditions, check out Karlovac weather in January.
September and February exhibit stark contrasts in weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 34°C (93°F) during the day, creating an average of 17°C (63°F) alongside a moderate level of humidity at 62%. This month also sees around 114 mm (4.5 in) of precipitation over approximately 11 days, signaling the transition to autumn.
In contrast, February is much colder, with nighttime lows dropping to -10°C (14°F) and daytime highs only reaching up to 21°C (70°F), culminating in an average temperature of just 4°C (40°F). This month is characterized by higher humidity at 83% and a total precipitation of 81 mm (3.2 in) over about 10 days, showcasing its wintry nature. For a detailed look at February’s weather, you can visit Karlovac weather in February.
In comparing the weather between September and March, notable differences emerge in both temperature and precipitation. September typically boasts a broader temperature range, with minimums around 3°C (38°F) and maximums reaching up to 34°C (93°F). This month also experiences higher average temperatures of approximately 17°C (63°F) alongside considerable precipitation totaling 114 mm (4.5 in) over 11 days, with humidity around 62%.
Conversely, March is much cooler, featuring minimum temperatures plummeting to -13°C (9°F) and average highs of 23°C (73°F). The total precipitation is less in March at 59 mm (2.3 in) over 9 days, but humidity is slightly higher at 75%. For a closer look at the specific weather conditions, you can check out Karlovac weather in March.
When comparing the weather in September and April, notable differences emerge. September typically sees a wider temperature range, with minimums around 3°C (38°F) and maximums hitting as high as 34°C (93°F), resulting in an average temperature of 17°C (63°F). In contrast, April starts off colder, with minimum temperatures dipping to -10°C (14°F) and reaching a maximum of 29°C (84°F), leading to an average of 11°C (53°F). Precipitation plays a lesser role in April, with 78 mm (3.1 in) over 10 days, compared to September's 114 mm (4.5 in) over 11 days. Notably, April tends to have higher humidity levels at 72%, compared to September's 62%. For more detailed information on April weather, check Karlovac weather in April.
In comparing the weather between September and May, we notice notable differences in both temperature and precipitation levels. September features a broader temperature range with a minimum of 3°C (38°F) and a maximum of 34°C (93°F), averaging around 17°C (63°F). In contrast, May has slightly cooler temperatures, with a minimum of 1°C (35°F) and a maximum of 31°C (89°F), averaging 16°C (61°F).
When it comes to precipitation, May experiences slightly more rainfall, totaling 129 mm (5.1 in) over 18 days, compared to September's 114 mm (4.5 in) over 11 days. Additionally, May tends to be more humid, with a humidity level of 70% versus September's 62%. For a detailed overview of the weather in May, you can check out Karlovac weather in May.
September weather is marked by a broader range of temperatures, with a minimum of 3°C (38°F), an average of 17°C (63°F), and a maximum that can reach up to 34°C (93°F). In contrast, June offers generally warmer conditions, featuring a minimum of 7°C (45°F), an average temperature of 21°C (71°F), and a peak temperature of 36°C (98°F). Precipitation is more abundant in September, with 114 mm (4.5 in) of rain falling over 11 days compared to June’s 71 mm (2.8 in) over just 9 days. Notably, humidity levels are slightly higher in June at 69%, compared to 62% in September. For a detailed look at June weather, you can visit Karlovac weather in June.
In comparing the weather between September and July, September experiences a broader range of temperatures, with minimums dropping to 3°C (38°F) and maximums reaching up to 34°C (93°F). In contrast, July maintains a higher average temperature, with minimums at 9°C (49°F) and maximums peaking at 36°C (97°F). While July sees slightly less precipitation at 84 mm (3.3 in) over 10 days, September is wetter with 114 mm (4.5 in) falling over 11 days. Humidity levels are comparable, with September at 62% and July at 64%. For more detailed weather insights, you can check Karlovac weather in July.
In comparing the weather between September and August, we notice several key differences. September experiences a broader temperature range, with minimums dropping to 3°C (38°F) and maximums reaching up to 34°C (93°F), while August maintains a warmer average, with minimums at 8°C (47°F) and maximums peaking at 40°C (104°F). Additionally, September brings more rainfall, with 114 mm (4.5 in) over 11 days, contrasting with August's 82 mm (3.2 in) spread over 9 days. Humidity levels are also higher in September at 62%, compared to August's 51%. For more specifics on August weather, you can check out Karlovac weather in August.
In September, the weather features a wide temperature range, with minimums reaching as low as 3°C (38°F) and maximums soaring up to 34°C (93°F), resulting in an average temperature of 17°C (63°F). Precipitation for the month totals 114 mm (4.5 in) over 11 days, accompanied by a humidity level of 62%.
In contrast, October brings cooler temperatures, with minimums dropping to 0°C (32°F) and maximums capping at 26°C (79°F), leading to a lower average of 12°C (54°F). This month also sees slightly less precipitation, totaling 102 mm (4.0 in) over 9 days and an increase in humidity at 81%.
For a closer look at the specific weather patterns in October, visit Karlovac weather in October.
September weather is characterized by a wide range of temperatures, with daily averages peaking at a pleasant 17°C (63°F) and highs reaching up to 34°C (93°F). In contrast, November experiences much cooler conditions, with average temperatures dropping to around 7°C (46°F) and nighttime lows potentially dipping to -4°C (26°F). While both months feature significant rainfall—September sees 114 mm (4.5 in) over 11 days, and November has a slightly lower total of 106 mm (4.2 in) across 13 days—the humidity levels also differ notably, with November being more humid at 87% compared to September's 62%. For more detailed information about November weather, visit Karlovac weather in November.
In September, the weather in Karlovac is characterized by a warm range of temperatures, with minimums around 3°C (38°F) and maximums reaching up to 34°C (93°F). This month typically sees an average temperature of 17°C (63°F) and experiences 114 mm (4.5 in) of rainfall over approximately 11 days, while humidity sits at a moderate 62%. In contrast, December brings a significant drop in temperatures, with lows plunging to -11°C (13°F) and an average temperature of just 3°C (38°F). The maximum temperature in December is milder at 18°C (65°F). Precipitation is slightly less at 104 mm (4.1 in) over 13 days, but humidity notably increases to 88%, resulting in a much chillier and damp atmosphere. For more details, visit Karlovac weather in December.
As the warm days of summer slowly transition into the cooler embrace of autumn, September in Karlovac offers a unique blend of mild temperatures and occasional rainfall. Unlike the peak summer months, where highs soar above 30°C, September brings a more moderate average of 17°C, making it a pleasant time for outdoor activities. While there's still warmth to enjoy, the increased humidity and the likelihood of rain—with precipitation occurring on about 11 days—signify the changing season. This month serves as a gentle reminder that nature is shifting gears, encapsulating the essence of early autumn. For a detailed overview of what to expect throughout the year, check out Karlovac Climate.