Last updated: March 17, 2025
In September, Groznjan, Croatia experiences a delightful blend of warm temperatures and refreshing breezes, with daily highs reaching a maximum of 32°C (90°F) and an average temperature of 20°C (68°F). The nights can be cooler, dipping to a minimum of 9°C (49°F), providing a comfortable respite from the daytime heat. With 164 mm (6.4 in) of precipitation spread over about 10 days, occasional rain showers contribute to the lush landscape, while humidity hovers around 64%, ensuring a pleasant atmosphere. This month's dynamic climate makes Groznjan an inviting destination for both adventure seekers and those looking to unwind amidst stunning natural scenery.
As summer fades into autumn, September in Grožnjan, Croatia, showcases a delightful transition in temperatures. With minimums around 9°C (49°F) and average highs reaching a pleasant 32°C (90°F), the month offers a perfect blend of warmth and coolness. This gradual cooling trend marks a noticeable drop from the scorching summer months, yet the 20°C (68°F) average keeps the days comfortably warm for outdoor activities and exploration. As the lush greenery begins to hint at autumn hues, September invites visitors to savor serene landscapes without the sweltering heat, making it a captivating time to experience the charm of this picturesque town.
September marks a significant peak in precipitation for Groznjan, Croatia, with 164 mm (6.4 in) of rain spread over 10 days, making it one of the wettest months of the year. This notable increase follows a relatively dry summer, where July and August saw only 65 mm (2.6 in) and 70 mm (2.7 in), respectively. The transition into autumn brings a refreshing change, as the lush, green landscape thrives under the nourishment of September's showers. Not only does this surge in rainfall contribute to the vibrant fall scenery, but it also sets the stage for an even wetter November, which typically receives around 176 mm (6.9 in). Thus, September serves as a bridge between the drier summer months and the more substantial autumn rains, highlighting the region's dynamic climate.
In September, Groznjan experiences a noticeable shift in humidity levels, settling at 64%. This marks a modest increase from the summer's low of 51% in August, as the region transitions into autumn. Throughout the earlier months of the year, humidity levels remained consistently high, peaking at 88% in January and February. The gradual decrease during the summer months reveals a climactic shift that signifies the end of the warmer season. However, as temperatures begin to cool, September serves as a bridge, hinting at the impending rise in humidity that will characterize the fall months, especially as it jumps to 83% in October and ascends back towards the higher levels experienced in winter. This seasonal ebb and flow of humidity reflects Groznjan’s diverse climate, painting a vibrant picture of its weather patterns.
In September, Groznjan, Croatia, experiences a UV Index of 7, which places it in the high exposure category and indicates a burn time of approximately 25 minutes. This reflects a gradual decline from the intense peak months of June and July, where the UV Index reached 9—a very high level demanding extra precautions. The transition into autumn is marked by a slight reduction, yet September still calls for vigilance due to its heightened UV rays. As summer fades and the sun's intensity lessens, it's essential to remain aware of UV exposure, especially as outdoor activities continue. For more detailed information about UV levels throughout the year, check out Groznjan UV Index.
UV Risk Categories
As summer fades and the crispness of fall approaches, September in Grožnjan, Croatia still radiates with a generous 326 hours of sunshine. Though a noticeable decline from the sun-drenched days of July and August, when sunshine peaked at 430 and 397 hours respectively, September holds on to a warmth that beckons both adventurers and art enthusiasts alike. Those golden rays serve as a gentle reminder of the vibrant summer months while heralding the quieter, reflective atmosphere that autumn brings. With daylight hours gradually decreasing, the charming streets of Grožnjan continue to be illuminated by both sunshine and the vivid hues of the changing leaves, making this a captivating time to explore the beauty of the Istria region.
In Groznjan, Croatia, September boasts a 59% chance of sunny weather, making it one of the more favorable months for sunshine as summer transitions into autumn. This increase in clarity follows the high of August, which has a notable 61% likelihood of sun. As the year progresses, we can observe a trend where the blooming warmth of summer gives way to slightly more variable conditions in the fall, yet September retains a significant amount of sunshine comparable to the sunnier months, such as June and July. This means visitors can still enjoy pleasant days under the Croatian sun, perfect for exploring the charming landscapes and vibrant culture.
In September, Groznjan, Croatia experiences a delightful 12 hours of daylight, marking a gentle transition as summer fades into autumn. This month bridges the summer's peak of 15 hours in June and July and the gradual decrease to 10 hours in October. The trend showcases a gradual dimming of days as the year matures, with daylight duration notably shorter than the preceding months, yet still offering ample sunlight for those wishing to explore the picturesque landscapes. As nature begins to shift, the balance of light serves as a gentle reminder of the changing seasons, inviting visitors to relish the last warm days before winter approaches.
As summer fades, September in Groznjan, Croatia, greets visitors with a gentle breeze, featuring an average wind speed of 2.4 m/s (5 mph). This marks a subtle decline from the warmer months, reflecting a tendency towards calmer conditions as the seasons transition. The winds, though lighter than those seen in the preceding months, create a serene atmosphere, inviting tranquil walks through the picturesque streets of this charming town. Notably, as the year progresses into autumn, wind speeds show an upward trend, with October and November promising brisker breezes at 3.6 m/s (8 mph) and 3.7 m/s (8 mph), respectively. This cyclical shift offers a refreshing contrast, enriching Groznjan’s vibrant landscape as nature prepares for the cooler months ahead.
The weather in Groznjan 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 Groznjan and find detailed weather information for every month.
September and January offer strikingly different weather conditions. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average of 20°C (68°F). This month experiences 164 mm (6.4 in) of precipitation over about 10 days and has a humidity level of 64%, creating a warm and somewhat humid atmosphere. In contrast, January sees much colder conditions, with temperatures dipping as low as -7°C (20°F) and only reaching a maximum of 13°C (56°F), averaging around 5°C (41°F). Precipitation is lower, at 56 mm (2.2 in) over 7 days, and humidity is notably higher at 88%, contributing to a chilly and damp environment. For more detailed insights into January's weather, you can visit Groznjan weather in January.
September and February present striking contrasts in weather. September offers a range of temperatures, with a minimum of 9°C (49°F), an average of 20°C (68°F), and a maximum of 32°C (90°F), creating a warm and inviting atmosphere for outdoor activities. In contrast, February experiences colder conditions, with temperatures dropping to a minimum of -6°C (22°F) and averaging only 7°C (44°F), peaking at 19°C (67°F). While September receives 164 mm (6.4 in) of precipitation over 10 days with a humidity level of 64%, February has slightly less rainfall at 118 mm (4.6 in) but a higher humidity level of 82%. For more details on February weather, you can visit Groznjan weather in February.
September and March present contrasting weather patterns. In September, temperatures are generally warm, with an average of 20°C (68°F), reaching highs of up to 32°C (90°F), while the minimum dips to 9°C (49°F). The month sees considerable precipitation, totaling 164 mm (6.4 in) over about 10 days, coupled with a humidity level of 64%. In contrast, March experiences cooler temperatures, with an average of 9°C (48°F), a maximum of 21°C (70°F), and a chilling minimum of -7°C (20°F). Precipitation is significantly lower at 71 mm (2.8 in) across 8 days, alongside a higher humidity of 73%. For more detailed insights, you can check Groznjan weather in March.
September and April present distinct weather patterns, reflecting their transitional roles within the year. In September, temperatures range more broadly, with minimums of 9°C (49°F) and maximums reaching up to 32°C (90°F), providing a taste of summer’s warmth before autumn sets in. The average temperature of 20°C (68°F) and a relative humidity of 64% make for pleasantly warm days, although the 164 mm (6.4 in) of precipitation over about 10 days indicates that rain can make an appearance.
In contrast, April is cooler, featuring a lower average temperature of 13°C (55°F) and a maximum of only 25°C (77°F). The minimum temperature drops to 1°C (34°F), signaling the lingering chill of early spring. With a higher humidity of 73%, April experiences less precipitation than September, totaling 103 mm (4.0 in) over the same number of days. For more details on April weather in Groznjan, check out Groznjan weather in April. Overall, September boasts warmer and wetter conditions, while April is characterized by its cooler and dryer climate.
September and May offer distinct weather patterns, each with its own charm. In September, temperatures range from a cooler 9°C (49°F) to a warm 32°C (90°F), averaging around 20°C (68°F). This month experiences slightly more precipitation, with 164 mm (6.4 in) over about 10 days and a humidity level of 64%. In contrast, May presents a milder climate, with temperatures starting at 7°C (46°F) and peaking at 27°C (81°F), averaging 17°C (63°F). Although May has a slightly lower total precipitation of 142 mm (5.6 in) spread over 17 days, it experiences higher humidity at 70%. For those looking to explore the weather in May specifically, you can find more details here: Groznjan weather in May.
When comparing the weather in September and June, both months display warm temperatures, but there are some notable differences. In September, the temperatures range from a minimum of 9°C (49°F) to a maximum of 32°C (90°F), with an average temperature of 20°C (68°F). This month sees higher precipitation levels, totaling 164 mm (6.4 in) spread over about 10 days, and humidity levels are around 64%. In contrast, June offers slightly milder temperatures, with a minimum of 11°C (53°F) and a maximum of 33°C (92°F), while the average temperature sits at 22°C (72°F). Additionally, June experiences less rainfall, with only 87 mm (3.4 in) over 8 days and higher humidity at 69%. For more detailed information, you can check Groznjan weather in June.
September and July exhibit distinct weather patterns. In September, temperatures can dip to a minimum of 9°C (49°F), while averaging around 20°C (68°F) and peaking at 32°C (90°F). This month also sees more rainfall, with 164 mm (6.4 in) of precipitation over approximately 10 days, contributing to a humidity level of 64%. In contrast, July experiences milder nights with a minimum temperature of 16°C (61°F), an average of 24°C (75°F), and a maximum of 33°C (91°F). Rain is less frequent in July, totaling 65 mm (2.6 in) over 8 days, with a slightly lower humidity level of 63%. For more details about July weather, visit Groznjan weather in July.
In comparing the weather between August and September, it is clear that September experiences a notable decline in temperature, with minimums dropping to 9°C (49°F) compared to August’s milder 15°C (59°F). The average temperature in September is also cooler at 20°C (68°F), while August boasts a warmer average of 25°C (77°F). Additionally, September sees significantly more precipitation, with 164 mm (6.4 in) recorded over 10 days, compared to August's 70 mm (2.7 in) over just 7 days. Humidity levels are higher in September at 64%, versus August's 51%, contributing to a different overall feel as summer transitions into fall. For more detailed information, check Groznjan weather in August.
As September transitions into October, significant changes in weather can be observed. September showcases warmer temperatures with a minimum of 9°C (49°F), an average of 20°C (68°F), and a maximum of 32°C (90°F). In contrast, October brings cooler conditions with temperatures dropping to a minimum of 6°C (44°F) and an average of 15°C (59°F), peaking at 23°C (74°F). Additionally, October experiences higher humidity at 83%, compared to September's 64%, despite a decrease in precipitation from 164 mm (6.4 in) in September to 107 mm (4.2 in) across the same number of days. To learn more about the weather specifics in October, visit Groznjan weather in October.
September typically brings warmer temperatures, with average highs reaching up to 32°C (90°F) and a more comfortable humidity level of 64%. In contrast, November sees a significant drop in temperatures, averaging around 11°C (52°F), with chilly minimums of just 1°C (34°F). Both months experience considerable rainfall, but November has slightly more precipitation at 176 mm (6.9 in) compared to September's 164 mm (6.4 in), and also more rainy days, averaging 12 compared to September's 10. The humidity increases significantly in November, soaring to 89%, making the air feel much colder. For more detailed information, check Groznjan weather in November.
September and December exhibit stark differences in weather patterns. September typically sees warmer temperatures, with a minimum of 9°C (49°F) and an average high of 32°C (90°F), along with a moderate level of humidity at 64%. In contrast, December experiences cooler conditions, where temperatures can drop to a minimum of -1°C (30°F) and only reach a maximum of 15°C (60°F). The month of December also brings about higher humidity levels at 88% and similar precipitation levels with 150 mm (5.9 in) over 12 days, compared to September's 164 mm (6.4 in) over 10 days. For those curious about December conditions in this region, you can find more details at Groznjan weather in December.
As September settles in, Groznjan experiences a delightful transition from the sweltering summer heat to more temperate conditions. With an average temperature that invites pleasant outdoor activities, you can expect mild days and cooler nights, making it a refreshing month for exploration. Although the region receives some rainfall, it's less frequent than in the peak of summer, allowing for plenty of sunshine amidst the changing scenery. This combination of comfortable warmth and occasional showers provides a unique charm, distinguishing September from the hotter months prior. For a deeper dive into what to anticipate year-round, feel free to check out Groznjan Climate.