Last updated: August 27, 2025
September in Slovenia showcases a dynamic climate, with temperatures ranging from a cool 0°C (33°F) at night to a pleasant maximum of 26°C (78°F) during the day. The average temperature sits comfortably at 14°C (58°F), making it an ideal time to explore the stunning landscapes. However, be prepared for frequent rain, as the month brings an average precipitation of 189 mm (7.4 in) over approximately 15 days, contributing to a humidity level of 74%. This blend of warmth and moisture creates a vibrant atmosphere, perfect for experiencing Slovenia's natural beauty.
As summer fades into autumn, September in Slovenia offers a delightful transition characterized by pleasantly mild temperatures. The month begins with a minimum of 0°C (33°F) and can peak at a comfortable 26°C (78°F), creating ideal conditions for exploring the country’s stunning landscapes. With an average temperature of 14°C (58°F), visitors can enjoy the warm days while witnessing the beautiful foliage of early autumn. This mild weather trend contrasts sharply with the chilling depths of winter that follow, making September a perfect time for outdoor adventures, local festivals, and enjoying the vibrant cultural scene in Slovenia.
In September, Slovenia experiences a notable increase in precipitation, with 189 mm (7.4 in) of rainfall spread over 15 days. This marks a shift from the drier summer months, where August saw 172 mm (6.8 in) over 17 days. The trend toward wetter weather in September is indicative of the transition into autumn, as precipitation levels typically rise compared to the preceding months. The increase not only contributes to the lush landscapes but also prepares the region for the more substantial rainfall that follows in October and November. As nature readies itself for the colder months, September’s rain serves as a vital resource for both agriculture and local ecosystems.
September in Slovenia experiences a noticeable shift in humidity, settling at a comfortable 74%. This marks a slight increase from the summer months, where August dipped to 68%, reflecting the gradual transition into the cooler fall season. As temperatures begin to drop, the humidity levels slightly rise again, preparing for the higher moisture content typical of autumn. Compared to earlier months, the trend shows a decline from the 91% humidity of January to September's more moderate levels, indicating a gradual easing of the summer swelter. The overall pattern signals a shift towards a more refreshing atmosphere, perfect for enjoying Slovenia's picturesque landscapes as the leaves start to change.
In September, Slovenia experiences a UV Index of 7, categorizing it as a high exposure month, with a burn time of approximately 25 minutes. This marks a gentle decline from the peak summer months, where indices reached a scorching 9, prompting careful sun protection. As autumn approaches, it's essential to remain vigilant while enjoying the outdoors. With the UV Index decreasing from August's high of 8, September offers a perfect balance of pleasant weather and manageable sun exposure. To ensure safe exposure throughout the year, stay informed about the varying UV levels and explore more about the UV Index in Slovenia.
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As summer gracefully transitions into autumn, September in Slovenia enjoys a generous 305 hours of sunshine, marking a delightful blend of warmth and crispness in the air. Following the peak sunshine of July and August, which basked in over 400 hours, September still holds its own, providing plenty of brilliant light for outdoor adventures and scenic exploration. The reduction in sunlight hours compared to the high summer months signals a gentle shift toward the cozy embrace of fall, inviting locals and visitors alike to enjoy the stunning landscapes as they turn vibrant with autumn hues. The steady decline in daylight continues into October, where 268 hours await, but September stands as a reminder of summer's lingering glow, making it a perfect time to soak in the last rays before the chill of winter sets in.
September in Slovenia offers a favorable likelihood of sunny weather, with a 43% chance of sunshine, mirroring the levels seen in both July and August. As summer transitions into autumn, the chance of sunny days remains relatively steady compared to the previous months, suggesting that those looking to experience the tail end of warm weather in Slovenia can still expect delightful days. This consistency highlights a trend of moderate sunshine, making September a pleasant time to explore the country's stunning landscapes and vibrant culture before the cooler months settle in.
As summer gives way to autumn in Slovenia, September brings a gentle transition in daylight duration, offering around 12 hours of natural light each day. This marks a noticeable decrease from the sun-drenched days of July and August, which boast up to 15 hours of daylight. The gradual shift from the long days of summer highlights the progression toward shorter daylight hours, a trend that continues into October with only 10 hours remaining. Although September's daylight is less than the enchanting summer months, it still captures the beauty of early fall, where the vibrant landscapes start to transform in preparation for the quieter months ahead.
In September in Slovenia, the wind embraces the landscape with a gentle average speed of 1.5 m/s (3 mph), mirroring the calmness of late summer. This subtle breeze signals a transition as it closely resembles the wind patterns of the preceding months, maintaining a consistent pace that suggests a harmonious balance in nature. Interestingly, while the wind starts to pick up slightly in October, September's gentle gusts offer a serene backdrop for residents and visitors alike, inviting leisurely strolls and reflective moments amidst the fading warmth of summer. As autumn approaches, this tender wind serves as a gentle reminder of the shifting seasons, setting the stage for the brisker winds that will soon follow.
Weather in varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in , focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparison to September, which boasts a milder range of temperatures from a minimum of 0°C (33°F) to a maximum of 26°C (78°F) and an average of 14°C (58°F), January presents a much colder climate with temperatures plummeting to a minimum of -14°C (7°F) and only reaching a maximum of 8°C (47°F), averaging at -2°C (29°F). Additionally, September experiences a higher amount of precipitation with 189 mm (7.4 in) over approximately 15 days, while January sees significantly less rainfall, totaling 65 mm (2.6 in) across just 6 days. Despite this, January's humidity is notably higher at 91%, compared to September's 74%, making it feel even colder. For a more detailed look, check out the weather in January.
September and February showcase a striking contrast in weather conditions. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 26°C (78°F), with an average of 14°C (58°F). The month experiences significant rainfall, totaling 189 mm (7.4 in) over approximately 15 days, while humidity sits at 74%. In contrast, February is much colder, with temperatures fluctuating between -17°C (2°F) and a maximum of 16°C (62°F), averaging just 1°C (34°F). Precipitation in February is lower at 122 mm (4.8 in) over 9 days, accompanied by higher humidity levels at 87%. For more detailed insights, check out the weather in February.
In comparing the weather between September and March, there is a notable contrast in temperatures and precipitation patterns. September experiences milder temperatures with a minimum of 0°C and an average of 14°C, reaching up to 26°C, while March has much colder min temperatures of -17°C and an average of only 4°C, peaking at 20°C. Despite March having less precipitation than September, with 113 mm over 11 days compared to September's 189 mm over 15 days, the humidity remains relatively high in both months, reaching 74% in September and 82% in March. For more detailed information, you can check the weather in March.
Comparing the weather in September and April, we can see notable differences in temperature and precipitation patterns. September typically enjoys milder temperatures, ranging from a minimum of 0°C (33°F) to a maximum of 26°C (78°F), with an average of 14°C (58°F). In contrast, April tends to have cooler conditions, with temperatures varying from a chilly -10°C (15°F) to a maximum of 24°C (76°F) and an average of 8°C (47°F). While both months see a fair amount of precipitation, September experiences a slight increase with 189 mm (7.4 in) over approximately 15 days, as opposed to April’s 155 mm (6.1 in) across 14 days. The humidity is also comparable, with September at 74% and April slightly higher at 79%. For more detailed information on April's weather, you can visit weather in April.
When comparing the weather in September and May, we observe notable differences in temperature and precipitation patterns. September features a slightly warmer average temperature, with minimums of 0°C (33°F) and maximums reaching 26°C (78°F), while May is typically a bit cooler, with average temperatures ranging from -1°C (31°F) to a max of 24°C (75°F). In terms of precipitation, September experiences 189 mm (7.4 in) over 15 days, whereas May is wetter, with 219 mm (8.6 in) spread over 23 days. Both months share a humidity level of 74%, indicating consistently moist conditions. For more detailed insights, you can check the weather in May.
In comparing the weather between September and June, we find notable differences in both temperature and precipitation patterns. In September, temperatures range from a chilly 0°C (33°F) to a more moderate maximum of 26°C (78°F), with an average of 14°C (58°F). This month also sees a significant amount of rainfall, totaling 189 mm (7.4 in) over 15 days, contributing to a humidity level of 74%. In contrast, June experiences warmer temperatures, with a minimum of 4°C (39°F), an average of 18°C (64°F), and a peak of 33°C (92°F). Precipitation in June is lighter at 143 mm (5.6 in) over 17 days, accompanied by a slightly higher humidity of 75%. For a more detailed look at the weather trends, check out the information on weather in June.
When comparing the weather in September to that of July, September tends to feature cooler temperatures, with daily averages around 14°C (58°F) compared to July's warmer average of 19°C (66°F). The maximum temperature in September reaches 26°C (78°F), while July can peak at 30°C (87°F). Additionally, September experiences more precipitation, totaling 189 mm (7.4 in) over about 15 days, whereas July sees slightly less, with 163 mm (6.4 in) spread across 19 days. Interestingly, both months share the same level of humidity at 74%, creating a damp atmosphere during the transition from summer to fall. For detailed information, you can check the weather in July.
In September, temperatures begin to drop, with a minimum of 0°C (33°F) and an average of 14°C (58°F), compared to the warmer August, which has a minimum of 7°C (45°F) and an average of 19°C (67°F). While August boasts higher maximum temperatures at 31°C (88°F), September sees a maximum reach of 26°C (78°F). September also experiences more precipitation, with 189 mm (7.4 in) recorded over 15 days, slightly higher than August's 172 mm (6.8 in) over 17 days. Additionally, September's humidity is elevated at 74%, compared to 68% in August. For more details on the August weather, you can visit weather in August.
September typically experiences warmer temperatures with a minimum of 0°C (33°F) and an average of 14°C (58°F), while October sees cooler conditions, dropping to a minimum of -2°C (29°F) and an average of 10°C (50°F). Precipitation is more frequent in September, totaling 189 mm (7.4 in) over 15 days compared to October's 143 mm (5.6 in) over just 11 days. Humidity levels also rise in October, reaching 88% compared to September's 74%. For more details on the weather patterns, you can visit weather in October.
September features milder temperatures, with a minimum of 0°C (33°F) and an average high of 26°C (78°F), making it considerably warmer than November, which sees a minimum of -11°C (12°F) and an average high of just 16°C (62°F). In terms of precipitation, September receives about 189 mm (7.4 in) over 15 days, while November has slightly higher rainfall at 200 mm (7.9 in) but over fewer days—just 12. Additionally, September's humidity is at 74%, whereas November's humidity rises to 90%, contributing to a chillier feel during the latter month. For more specifics, you can explore the detailed weather in November.
September and December present a stark contrast in weather characteristics. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 26°C (78°F), with an average of 14°C (58°F). This month typically experiences 189 mm (7.4 in) of precipitation over 15 days and maintains a humidity level of 74%. In comparison, December sees much colder temperatures, with a minimum of -14°C (8°F) and a maximum of 11°C (51°F), averaging around 0°C (32°F). Although precipitation slightly decreases to 179 mm (7.0 in) over 10 days, humidity rises to 89%, making the air feel even colder. For more detailed information, you can check the weather in December.
As September enters, Bohinj transitions into a season of change, marked by a refreshing drop in temperature compared to the warmer summer months. With an average temperature of 14°C, this month brings a crispness to the air, making it ideal for outdoor activities amidst breathtaking autumnal landscapes. However, it’s also a time to prepare for increased precipitation as rain showers grace nearly half the days of the month, contributing to a humid atmosphere at 74%. This unique blend of cooler temperatures and substantial rainfall sets September apart, paving the way for the vibrant colors and cozy experiences of fall. For more insights, explore our detailed Climate information.