Last updated: August 21, 2025
September in Trebinje, Bosnia and Herzegovina brings a delightful transition into autumn, characterized by a maximum temperature of 29°C (84°F) and an average of 19°C (67°F). As the month progresses, cooler evenings are reflected in the minimum temperatures dipping to 8°C (47°F). The region experiences precipitation totaling 97 mm (3.8 in) over approximately 8 days, contributing to a moderate humidity level of 65%. This weather pattern creates a pleasant environment for exploring Trebinje's scenic beauty, perfectly blending warm days with refreshing nights.
In September, Trebinje experiences a delightful transition as summer gracefully gives way to autumn. With minimum temperatures ranging around 8°C (47°F) and peaking at a comfortable 29°C (84°F), this month offers an inviting average of 19°C (67°F). Compared to the sweltering highs of August, which reach up to 33°C (92°F), September brings a refreshing reprieve, making outdoor exploration particularly enjoyable. The mild temperatures provide an ideal backdrop for savoring the local scenery, as the lush landscapes begin to show hints of fall foliage. This shift not only marks a change in the weather but also invites visitors to experience the evolving beauty of Trebinje.
In September, Trebinje experiences a noticeable shift in precipitation, with 97 mm (3.8 in) of rain falling over an average of 8 days. This marks a significant increase from the drier summer months, particularly July and August, which saw only 38 mm (1.5 in) and 41 mm (1.6 in) respectively. As the region transitions into autumn, September's rainfall begins to set the stage for the wetter months ahead, with October and November delivering even higher totals of 141 mm (5.5 in) and 290 mm (11.4 in). This trend highlights the importance of September as a pivotal month that bridges the summer’s dryness with the impending autumnal deluge, reinforcing the rhythm of Trebinje's climatic cycles.
In September, Trebinje experiences a notable shift in humidity levels, averaging around 65%. This marks a significant increase from the drier conditions of summer, particularly August, which boasts the year's lowest humidity at 53%. As the warmth of summer fades, September signals the onset of a more moderate climate, serving as a transition into the wetter months ahead. The gradual increase in humidity reflects the changing seasons as the city prepares for the autumn chill, with humidity levels starting to rise again toward the higher averages seen in October and November. Overall, September presents a comfortable balance that enhances the region's vibrant landscape, making it a delightful time for both locals and visitors to enjoy the outdoors.
In September, Trebinje experiences a UV Index of 7, categorized as high, which means that sun exposure can lead to skin damage in just 25 minutes without protection. This is a slight decline from the peak summer months of July and June, when the UV Index hits a maximum of 10 and warrants extra caution. As the seasons shift, the UV levels begin to decrease, signaling a transition towards milder sun exposure. Nevertheless, it remains essential to recognize the risk and take necessary precautions during this month. For more detailed information, check out the Trebinje UV Index.
UV Risk Categories
As September rolls in, Trebinje, Bosnia and Herzegovina, basks in 344 hours of sunshine, marking a gentle transition from the sweltering summer months. This month showcases a delightful balance, significantly lower than the peak of 433 hours in July but still plentiful compared to the earlier months of the year. The sun-drenched landscape hints at the approaching autumn, yet retains the warmth that characterizes the late summer. Following the vibrant hues of August's 404 hours, September's weather invites outdoor explorations against a backdrop of colorful foliage. The trend of gradually decreasing sunshine hours continues into October, yet the vibrant days of September linger on, creating a perfect opportunity to enjoy the scenic beauty of this charming region.
In September, Trebinje experiences a 57% chance of sunny weather, which marks a noticeable decline from the peak summer months of July and August, where the likelihood of sunshine reaches impressive heights of 75% and 76%, respectively. This transitional month bridges the vibrancy of summer with the cooler embrace of fall, offering a mixture of sunny days and the onset of autumnal weather. Compared to earlier months like June, which boasts a 70% chance of clear skies, September still retains a fair amount of sunshine, making it a delightful time for outdoor activities. However, as the year progresses into October, the probability of sunny days dips slightly to 55%, indicating that while September holds onto summer's charm, the approach of fall begins to temper its brightness.
As summer gracefully fades into autumn, September in Trebinje, Bosnia and Herzegovina, offers a gentle transition with approximately 12 hours of daylight. This month marks a slight decline from the vibrant 14 hours experienced in May and June, highlighting a gradual shift as the days shorten. Following the lengthy summer days, September provides a harmonious balance before the daylight dips further to 11 hours in October. The evolving daylight patterns reflect the seasonal changes, inviting residents and visitors alike to savor the lingering warmth of early fall while preparing for the cooler months ahead.
In September, Trebinje experiences a transition as the summer warmth begins to wane, reflected in the average wind speed which drops to 2.2 m/s (5 mph). This gentle breeze marks a shift from the more brisk winds of winter and early spring, where speeds hover around 3.3 to 3.7 m/s. As the sultry summer months give way to autumn, the winds become softer and more soothing, creating a tranquil atmosphere ideal for leisurely strolls through the picturesque streets. This calm precedes the more invigorating winds of October, which will bring a refreshing lift to the changing season. Overall, September's mild breezes invite residents and visitors alike to savor the serene beauty of Trebinje as it transitions into the vibrant colors of fall.
Weather in Trebinje varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Trebinje, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. September enjoys milder temperatures, with a minimum of 8°C (47°F) and an average of 19°C (67°F), peaking at a pleasant 29°C (84°F). Conversely, January is much colder, recording a minimum of -12°C (10°F) and an average of just 5°C (40°F), with a maximum temperature of 15°C (59°F). While September experiences approximately 97 mm (3.8 in) of precipitation over 8 days, January sees a bit more rain with 124 mm (4.9 in) over 11 days, coupled with higher humidity at 88%. For a deeper look into January weather, you can explore Trebinje weather in January.
September and February present contrasting weather patterns in Trebinje. In September, temperatures can range from a cool 8°C (47°F) at night to a warm 29°C (84°F) during the day, with an average of 19°C (67°F). The month sees moderate rainfall, with about 97 mm (3.8 in) over 8 days, making it a more pleasant time of year with lower humidity at 65%. In stark contrast, February experiences much cooler temperatures, with highs of 18°C (65°F) and lows dropping to -5°C (23°F), resulting in an average of just 7°C (45°F). Precipitation is notably higher in February, accumulating 173 mm (6.8 in) over 11 days, alongside increased humidity at 82%. For more detailed information, visit Trebinje weather in February.
September and March present contrasting weather conditions. September typically boasts milder temperatures, with a minimum of 8°C (47°F) and an average high of 29°C (84°F), while March experiences chillier weather, dipping as low as -6°C (22°F) with a maximum of 20°C (68°F). Precipitation is more frequent in March, averaging 160 mm (6.3 in) over 11 days compared to September’s 97 mm (3.8 in) across 8 days. Additionally, March has a higher humidity level of 79%, compared to September's 65%, contributing to a noticeably different feel between the two months. For more specific details on March weather, visit Trebinje weather in March.
When comparing the weather in September and April, several key differences emerge. September typically enjoys warmer temperatures, with average highs reaching 29°C (84°F), while April has a much cooler average maximum of only 24°C (76°F). The minimum temperatures in September are generally higher as well, averaging 8°C (47°F) compared to April's chilly 0°C (32°F). However, April experiences slightly more precipitation, totaling 121 mm (4.8 in) over 11 days, while September sees 97 mm (3.8 in) over 8 days. Additionally, April's humidity is higher at 75%, compared to 65% in September. For more detailed information on April's weather, you can visit Trebinje weather in April.
When comparing the weather in September and May, notable differences emerge in temperature and precipitation. September enjoys a warmer climate with average temperatures around 19°C (67°F), peaking at 29°C (84°F), while May is cooler, offering an average of 16°C (61°F) and a maximum of 26°C (80°F). Additionally, September sees less rainfall, with approximately 97 mm (3.8 in) over about 8 days, compared to May's 117 mm (4.6 in) spread across 14 days. This results in higher humidity levels in May at 74%, in contrast to September's 65%. For a deeper dive into the specifics of May weather, you can check Trebinje weather in May.
When comparing the weather in September and June, we observe some notable differences. September typically features slightly cooler temperatures, with a minimum of 8°C (47°F) and a maximum reaching 29°C (84°F), while June starts off a bit milder, with minimums around 10°C (50°F) and peaks of 32°C (89°F). Precipitation levels reveal that September is wetter, receiving 97 mm (3.8 in) over about 8 days compared to June's 58 mm (2.3 in) across 9 days. Humidity is fairly consistent, with September at 65% and June slightly higher at 66%. For a more detailed understanding of June weather, you can refer to Trebinje weather in June.
When comparing the weather in September to that in July, we see notable differences in both temperature and precipitation. September tends to be cooler, with average temperatures ranging from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), while July boasts warmer averages of 14°C (57°F) to 33°C (91°F). Additionally, September experiences more precipitation, totaling 97 mm (3.8 in) over about 8 days, compared to July's 38 mm (1.5 in) across just 4 days. Humidity levels are slightly higher in September at 65%, compared to July’s 59%, which contributes to a more humid feel during the early autumn month. For a more detailed look at July weather in Trebinje, you can check Trebinje weather in July.
In comparing the weather between September and August, September experiences cooler temperatures with a minimum of 8°C (47°F) and an average of 19°C (67°F), whereas August is warmer, showcasing a minimum of 15°C (59°F) and an average of 24°C (75°F). The maximum temperature in September peaks at 29°C (84°F) compared to August’s high of 33°C (92°F). Additionally, September sees more precipitation, totaling 97 mm (3.8 in) over 8 days, in contrast to August's 41 mm (1.6 in) during just 6 days. Humidity is also higher in September at 65%, compared to August's 53%. For further details on August weather specifically, visit Trebinje weather in August.
September and October present a notable shift in weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), with an average of 19°C (67°F). The month experiences around 97 mm (3.8 in) of precipitation over 8 days and maintains a humidity level of 65%. In contrast, October sees cooler temperatures, with a minimum of 5°C (42°F) and a maximum of 24°C (76°F), averaging at 15°C (59°F). Precipitation increases to 141 mm (5.5 in) over 9 days, accompanied by a rise in humidity to 78%. For more detailed insights, you can explore Trebinje weather in October.
September weather typically showcases a warmer climate, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 29°C (84°F), resulting in an average of 19°C (67°F). This month sees about 97 mm (3.8 in) of rainfall over 8 days, with a humidity level around 65%. In contrast, November brings a notable drop in temperature, where the average is only 11°C (53°F), with minimums dipping to 1°C (34°F) and maximums reaching 21°C (71°F). Additionally, November is significantly wetter, with precipitation totaling 290 mm (11.4 in) over 12 days and a higher humidity of 85%. For more detailed insights, you can check Trebinje weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 8°C (47°F) at night to a warm 29°C (84°F) during the day, making it a pleasant month with an average temperature of 19°C (67°F). However, it also experiences moderate rainfall, totaling 97 mm (3.8 in) over about 8 days, accompanied by a humidity level of 65%.
In comparison, December brings much cooler temperatures, with nighttime lows plunging to -1°C (31°F) and daily highs reaching a maximum of 16°C (60°F). The average temperature drops to just 7°C (45°F), and precipitation increases significantly to 259 mm (10.2 in) over 15 days, leading to higher humidity levels of 86%. For more detailed information, you can refer to Trebinje weather in December.
As September unfolds in Trebinje, the weather presents a delightful transition from summer's heat to the cooler charms of autumn. With maximum temperatures reaching a comfortable 29°C (84°F), the month strikes a balance between warmth and crispness, inviting outdoor exploration. The average temperature settles at a pleasant 19°C (67°F), offering mild days and cool evenings, unlike the scorching summer months. Although the precipitation increases to 97 mm over approximately 8 days, this adds a refreshing touch to the landscape, enhancing the lush surroundings. The humidity remains moderate at 65%, creating a refreshing atmosphere. As September progresses, Trebinje reveals its serene beauty and vibrant colors, making it an ideal time to visit. For more insights into the city's weather patterns, check out Trebinje Climate.