Last updated: March 17, 2025
September in Rijeka, Croatia welcomes the gentle transition from summer to autumn, showcasing a maximum temperature of 29°C (85°F) and an average of 18°C (64°F), ideal for outdoor exploration. While the warmth persists, minimum temperatures can dip to 7°C (44°F), reminding visitors that cooler nights are on the horizon. The month sees about 194 mm (7.7 in) of precipitation over 11 days, adding a refreshing touch to the landscape. With an average humidity level of 64%, the air retains a comfortable feel, making September a delightful time to experience Rijeka's vibrant culture and stunning coastal scenery.
As summer whispers its final goodbyes, September in Rijeka ushers in a delightful transition with temperatures ranging from a mild 7°C (44°F) at night to a warm 29°C (85°F) during the day. The average temperature settles at a comfortable 18°C (64°F), providing perfect conditions for enjoying the beautiful Adriatic coastline. This month marks a notable shift from the sweltering heat of August, evidenced by a decrease in the maximum temperature, making outdoor activities more enjoyable without the summer scorch. As the days begin to shorten, the pleasant warmth lingers, inviting visitors to explore the city's cultural richness amidst the backdrop of a vibrant autumn palette.
In September, Rijeka experiences a notable spike in precipitation, with an impressive 194 mm (7.7 in) of rainfall over 11 days. This increase marks a significant transition from the drier summer months, where August's rainfall dwindled to just 72 mm (2.8 in). As the city shifts into autumn, these wetter conditions pave the way for lush landscapes and a refreshing atmosphere. September’s precipitation not only outpaces that of both January and July but also sets the stage for the higher rainfall totals seen in the subsequent months, particularly November and December. This trend highlights Rijeka’s dynamic climate, reflecting the delicate balance between seasonal changes and the vibrant tapestry of nature that envelops the region.
In September, Rijeka, Croatia experiences a notable shift in humidity as the summer months draw to a close. With a humidity level of 64%, September marks a transition from the drier August, which boasted a low of 51%, indicating a return to milder, more comfortable conditions. As the region moves into autumn, humidity levels begin to rise again, anticipating the wetter months ahead. This trend is evident as humidity steadily increases in the following months, peaking at 89% in November. Thus, while September offers a brief reprieve from summer’s heat, it signals the onset of more humid days as Rijeka prepares for the changing seasons.
As September arrives in Rijeka, Croatia, the UV Index reflects a gradual decline from the peak summer months while still posing a significant risk to sunbathers. With a UV Index of 7, classified as high, residents and visitors should take care to protect their skin, especially considering the 25-minute burn time. This month's UV levels are lower than the extreme heights of 9 seen in July and June, yet still warrant caution. As we transition into autumn, awareness of the sun's intensity remains crucial to prevent skin damage. For a more detailed understanding of the UV trends throughout the year, check out Rijeka UV Index.
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September in Rijeka, Croatia, embraces a beautiful shift towards autumn while still basking in 331 hours of sunshine. This delightful month marks a gradual decline from the summer peak, which saw a peak of 432 hours in July and 401 hours in August. As the days grow shorter, sunlight subtly transitions into the rich hues of fall, offering a perfect backdrop for exploration and relaxation. Interestingly, as we move from summer’s abundance, September's ample sunlight still outshines the cooler months ahead, highlighted by the drop to 302 hours in October. This blend of warmth and light creates an enchanting atmosphere, making September an ideal time to savor the lingering sun in this coastal gem.
In Rijeka, Croatia, September enjoys a promising 57% chance of sunny weather, making it one of the sunniest months of the year. This trend is evident as the summer months of June and August present similar sunny probabilities of 58% and 59%, respectively. Interestingly, September maintains its brightness, following a peak in July with 53%, signifying a warm transition into autumn. While the sun's presence begins to wane in the following months like October at 42%, visitors can still relish the lingering warmth and vibrant skies of early fall in this beautiful coastal city.
As summer gracefully transitions into autumn, September in Rijeka, Croatia, offers a delightful balance of daylight, with approximately 12 hours of sunlight. This marks a gentle decline from the sun-drenched days of June and July, which basked in 15 hours of daylight, sustaining the warm, vibrant atmosphere of summer. As the month unfolds, daylight wanes, inching towards the shorter days of fall when October brings about just 10 hours. This gradual shift not only enriches the landscape with the soft hues of early autumn but also invites locals and visitors alike to savor the fading warmth of daylight before winter approaches. The rhythm of the seasons is beautifully encapsulated in Rijeka's changing light, symbolizing nature's cycle as it prepares for the colder months ahead.
As summer fades into autumn, September's gentle breezes in Rijeka, Croatia, offer a smooth transition, with an average wind speed of 2.5 m/s (6 mph). This is slightly less than the summer month's peak, reflecting a calming down from the lively winds of August. The trend shows a gradual decrease in wind speed from the early summer months, followed by a modest increase again in October, suggesting that Rijeka's winds dance softly through the transition of seasons. September's pleasant winds create an inviting atmosphere, perfect for enjoying the city's coastal charm before the cooler months arrive.
The weather in Rijeka 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 Rijeka and find detailed weather information for every month.
September and January exhibit vastly different weather characteristics. In September, the temperatures range from a cool 7°C (44°F) to a warm 29°C (85°F), with an average of 18°C (64°F). The month is relatively wet, receiving 194 mm (7.7 in) of precipitation over approximately 11 days, with humidity sitting at 64%. In contrast, January is chilly, with temperatures averaging 3°C (38°F), dipping as low as -13°C (10°F) and reaching a maximum of 13°C (56°F). The winter month experiences less precipitation, totaling 105 mm (4.1 in) over about 9 days, but features a higher humidity level at 88%. For more detailed information about the weather in January, you can visit Rijeka weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a mild 7°C (44°F) to a warm 29°C (85°F), with an average of 18°C (64°F), making it a comfortable time for outdoor activities. The month experiences 11 days of rainfall, accumulating about 194 mm (7.7 in) of precipitation, coupled with a moderate humidity level of 64%. Conversely, February sees considerably colder temperatures, with a minimum of -9°C (16°F) and a maximum of 20°C (68°F), averaging only 5°C (42°F). Rainfall during this month totals 168 mm (6.6 in) spread over 13 days, and the humidity is notably higher at 82%. For those looking for more detailed information, you can explore Rijeka weather in February.
September and March present notably different weather conditions. In September, temperatures range from a mild 7°C (44°F) to a warm 29°C (85°F), with an average of 18°C (64°F). The month experiences considerable precipitation, totaling 194 mm (7.7 in) over 11 days, along with a humidity level of 64%. In contrast, March sees much cooler temperatures, with a minimum of -11°C (13°F) and a maximum of 20°C (68°F), averaging only 7°C (45°F). Although March has lower total precipitation at 115 mm (4.5 in) over 13 days, the humidity is slightly higher at 73%. These differences reflect the transition from summer's warmth in September to the late winter chill of March. For more details, you can check Rijeka weather in March.
In comparing September and April weather, September offers a much warmer climate with average temperatures reaching 18°C (64°F) and highs of 29°C (85°F), while April sees cooler temperatures with an average of 11°C (52°F) and a maximum of 23°C (74°F). Additionally, September experiences more precipitation, totaling 194 mm (7.7 in) over 11 rainy days, compared to April’s 110 mm (4.3 in) also spread over 11 days. Notably, humidity levels are slightly higher in April at 73%, compared to September’s 64%. For a closer look at what to expect in April, you can visit Rijeka weather in April.
In comparing the weather between September and May, we can observe significant differences in temperature and precipitation patterns. September enjoys warmer temperatures, ranging from a minimum of 7°C (44°F) to a maximum of 29°C (85°F), with an average of 18°C (64°F). In contrast, May tends to be cooler, with temperatures varying from a minimum of 4°C (39°F) to a maximum of 25°C (78°F), averaging 15°C (59°F). Although both months experience considerable precipitation, September records slightly higher with 194 mm (7.7 in) over 11 days, while May has 164 mm (6.5 in) spread over 19 days. Humidity levels are quite similar, with May showing a slight increase at 70% compared to September's 64%. For more detailed insights, you can check Rijeka weather in May.
In comparing the weather between September and June, we can observe some notable differences. September experiences a wider temperature range, with a minimum of 7°C (44°F) and a maximum of 29°C (85°F) and an average of 18°C (64°F), while June tends to be warmer overall, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 34°C (93°F) and an average of 20°C (69°F). Additionally, September is significantly wetter, receiving 194 mm (7.7 in) of precipitation over 11 days compared to June's 74 mm (2.9 in) over 10 days. Humidity levels are also slightly higher in June at 69%, compared to 64% in September. For more details on June weather, you can refer to Rijeka weather in June.
When comparing the weather between September and July, we see notable differences in temperature and precipitation. September experiences a wider temperature range, with minimums dropping to 7°C (44°F) and maximums reaching 29°C (85°F), averaging at 18°C (64°F). In contrast, July is warmer overall, with minimum temperatures at 13°C (56°F), maximums peaking at 31°C (89°F), and an average of 22°C (72°F). Additionally, September is significantly wetter, receiving 194 mm (7.7 in) of precipitation over 11 days, compared to July's 85 mm (3.3 in) over the same number of days. Despite both months having approximately the same humidity levels—around 63-64%—the summer warmth of July is often preferable for outdoor activities. For a more detailed look at July weather, you can visit Rijeka weather in July.
In comparing the weather of September and August, significant differences emerge. September experiences a wider temperature range, with minimums dropping to 7°C (44°F) and maximums reaching 29°C (85°F), while the average temperature is cooler at 18°C (64°F). In contrast, August is notably warmer, with minimum temperatures of 12°C (54°F) and maximums peaking at 33°C (93°F), resulting in a higher average of 23°C (73°F). Additionally, September is wetter, receiving 194 mm (7.7 in) of precipitation over 11 days, compared to August's 72 mm (2.8 in) over just 7 days. The humidity levels also differ, with September being more humid at 64%, while August maintains a lower level at 51%. For more specifics on August weather, visit Rijeka weather in August.
In September, the weather is generally warmer, with average temperatures reaching up to 18°C (64°F) and maximums of 29°C (85°F), while October sees a drop in temperatures, with averages around 13°C (56°F) and maximums peaking at 24°C (75°F). Precipitation is slightly lower in October, at 162 mm (6.4 in), compared to September's 194 mm (7.7 in), although both months experience a similar number of rainy days—11 in September and 12 in October. Additionally, October tends to be more humid, with levels at 83%, up from September's 64%. For more detailed insights on October weather, check out Rijeka weather in October.
September and November exhibit notable contrasts in weather patterns. In September, temperatures range from a mild 7°C (44°F) at night to a warm 29°C (85°F) during the day, with an average of 18°C (64°F). However, the month experiences considerable rainfall, totaling 194 mm (7.7 in) over 11 days, accompanied by a moderate humidity of 64%. In contrast, November sees a significant drop in temperatures, with a minimum of -1°C (31°F) and a maximum of 18°C (65°F), yielding a cooler average of 9°C (48°F). This month tends to be wetter, with precipitation reaching 204 mm (8.0 in) over 14 days and higher humidity levels at 89%. For a deeper look at the weather patterns, you can visit Rijeka weather in November.
September weather in Rijeka is comparatively warmer, with average temperatures around 18°C (64°F) and highs reaching up to 29°C (85°F). This month sees a moderate level of rainfall, with approximately 194 mm (7.7 in) over about 11 days, and humidity levels around 64%. In contrast, December brings much cooler conditions, featuring average temperatures of 5°C (41°F) and maximums peaking at 14°C (57°F). The month is also wetter, with rainfall totaling about 226 mm (8.9 in) across 15 days, and humidity rises significantly to 88%. For a detailed overview of the winter climate, you can refer to Rijeka weather in December.
As summer gently transitions to autumn, September in Rijeka offers a delightful blend of warm days and cooler nights, making it a unique time to visit. With temperatures reaching up to 29°C (85°F) during the day, the warmth still lingers, contrasting with the refreshing chill of the evenings that often dip to around 7°C (44°F). While you can expect some rain, with an average of 11 precipitation days, the overall humidity sits at a comfortable 64%. This month serves as a perfect bridge between the vibrant summer energy and the quieter, cooler months ahead, providing a wonderful opportunity to explore the city's beautiful landscapes and cultural richness. For more detailed insights into what to expect, check out Rijeka Climate.