Last updated: August 27, 2025
September in Slovenia brings a blend of mild weather and refreshing rainfall, making it a unique time to experience the country's natural beauty. With maximum temperatures reaching 28°C (83°F) and an average of 15°C (60°F), days can be pleasantly warm. However, as the month progresses, the minimum temperature can drop to a brisk 0°C (33°F), reminding visitors that autumn is on the horizon. The region sees about 152 mm (6.0 in) of precipitation over 13 days, with humidity levels around 74%, creating a lush, vibrant landscape. Whether exploring charming towns or hiking in the picturesque countryside, September offers a refreshing escape into Slovenia's stunning scenery.
As September rolls into Slovenia, the landscape begins to transition from the sweltering heat of summer to the crispness of autumn. Temperatures typically range from a minimum of 0°C (33°F) to a comfortable average of 15°C (60°F), peaking at a delightful 28°C (83°F). This month is characterized by a noticeable shift, with nights becoming cooler and days remaining pleasantly warm, creating an ideal backdrop for outdoor activities. The gradual decline in temperatures hints at the changing seasons, making September a perfect time to explore Slovenia's natural beauty before winter approaches. So whether you're hiking in the hills or wandering through charming towns, you'll find the weather just right for adventure.
September in Slovenia typically sees a significant uptick in rainfall, with an impressive 152 mm (6.0 in) of precipitation, making it one of the wetter months of the year. This month stands out not only for its abundant rainfall but also for its consistent number of precipitation days at 13, which marks a slight decrease from the wetter summer months. Following a trend of increasing precipitation from the drier winter months, September's rain nurtures the lush landscapes, paving the way for a vibrant autumn. With a rich tapestry of rainfall throughout the year, from a moderate 46 mm in January to the lush peak in May with 159 mm, September's contribution underscores the transition into the cooler, more dynamic weather patterns of fall.
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.
As summer fades into autumn, September in Slovenia presents a notable shift in the UV Index, with a measured value of 7—a high exposure category. Although this is a slight decrease from the peak values seen in July and August, where the UV Index soared to 9, it still suggests a careful approach to sun exposure, allowing for a burn time of 25 minutes for fair-skinned individuals. This month serves as a reminder of the lingering strength of the sun's rays, bridging the transition into milder months while encouraging outdoor enthusiasts to stay sun safe. For more insights into sun safety throughout the year, check the UV Index.
UV Risk Categories
September in Slovenia offers a delightful balance of sunshine, boasting an impressive 309 hours of bright skies. As summer's warmth transitions into autumn, this month reflects a gentle dip in sunlight after the peak of July, which recorded 415 hours. Notably, September's sunshine is still abundant compared to the earlier months, showcasing an overall upward trend from the chilly depths of winter. Following this vibrant month, October sees a further decrease to 275 hours, signaling the gradual retreat of summer's glow. Embrace the golden days of September, where the lingering warmth of summer still dances in the crisp autumn air.
As September rolls in, Slovenia experiences a notable enhancement in sunny weather, with a 49% chance of clear skies. This marks a significant increase compared to the earlier summer months, reflecting a slight dip from July and August but still remaining robust. While the chances of sun are more favorable than most other months, with March boasting the highest optimism at 55%, September stands out as a transitional month. As the vibrancy of summer begins to wane, this moderate likelihood of sunshine offers a perfect backdrop for those looking to explore Slovenia's breathtaking landscapes before the cooler autumn air sets in. Embrace the warmth while you can, as the sunny days become fewer with the approach of October's 34% likelihood.
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.
As September arrives in Slovenia, the gentle caress of the wind continues a trend noticed throughout the summer months. With an average wind speed of 1.5 m/s (3 mph), the breezes are mild and inviting, reminiscent of the calming August air. This slight decrease from the previous month aligns with a broader pattern observed from mid-summer into early autumn, highlighting a tranquil transition. September's winds, while not the strongest of the year, offer a refreshing reminder of nature's ebb and flow as the region gradually shifts towards the cooler months ahead. Embracing this serene climate, locals and visitors alike can enjoy the outdoors, savoring the lingering warmth and welcoming winds of early fall.
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 September, the weather is generally milder, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 28°C (83°F) and an average of 15°C (60°F). The month experiences significant precipitation, with 152 mm (6.0 in) spread over 13 days, resulting in a humidity level of 74%. In contrast, January brings much colder conditions, featuring temperatures that plummet to -16°C (4°F) at their lowest, peak at a maximum of 12°C (53°F), and average around -1°C (31°F). With only 46 mm (1.8 in) of precipitation over just 6 days, January is not only drier but also boasts a higher humidity level of 91%, making it feel even colder. For more details, check the weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a chilly 0°C (33°F) at night to a warm 28°C (83°F) during the day, with an average temperature of 15°C (60°F). This month experiences significant rainfall, with 152 mm (6.0 in) spread over 13 days, and a humidity level of 74%. In contrast, February is much colder, with temperatures dipping as low as -14°C (8°F) and averaging just 2°C (37°F). The maximum temperature reaches 18°C (65°F), but the month sees less precipitation overall at 79 mm (3.1 in) over 8 days, coupled with a higher humidity of 87%. For more detailed insights, check out the weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a chilly 0°C (33°F) at night to a warm 28°C (83°F) during the day, with an average of 15°C (60°F). The month experiences considerable rainfall, totaling 152 mm (6.0 in) over 13 days, and has a humidity level of 74%. In contrast, March is much colder, with temperatures dropping as low as -16°C (3°F) at night and peaking at 21°C (70°F) during the day, averaging around 5°C (41°F). This month sees less precipitation, amounting to 70 mm (2.8 in) across 9 days, alongside a slightly higher humidity of 82%. For a more detailed overview of conditions, you can check the weather in March.
September and April present distinct weather profiles, each characterized by unique temperatures and precipitation patterns. In September, temperatures can range from a chilling 0°C (33°F) at night to a warm 28°C (83°F) during the day, with an average of 15°C (60°F). The month experiences considerable rainfall, totaling 152 mm (6.0 in) over about 13 days, and a humidity level of 74%.
In contrast, April tends to be cooler, with nighttime temperatures dipping to -9°C (16°F) and daytime highs reaching up to 25°C (77°F), resulting in an average temperature of 10°C (50°F). Although total precipitation is lower at 100 mm (3.9 in) over 12 days, April is slightly more humid at 79%. For a more detailed look at April's climate, you can visit weather in April.
September and May share similar temperature ranges, with both months featuring minimum temperatures around freezing and maximum temperatures in the mid-20s Celsius. However, while September enjoys an average temperature of 15°C (60°F), May is slightly cooler at 14°C (57°F). In terms of rainfall, May sees a marginally higher total precipitation of 159 mm (6.3 in) across 19 days compared to September's 152 mm (6.0 in) over 13 days. Remarkably, both months maintain consistent humidity levels at 74%. For a more detailed look at May's weather, you can check out weather in May.
September and June present quite different weather patterns. In September, temperatures range from a chilly 0°C (33°F) to a warm 28°C (83°F), with an average of 15°C (60°F). This month experiences significant rainfall at 152 mm (6.0 in) over approximately 13 days, coupled with a humidity level of 74%. In contrast, June boasts milder temperatures, with minimums of 4°C (40°F) and maximums peaking at 34°C (93°F), averaging around 19°C (66°F). Precipitation in June is lower at 96 mm (3.8 in) over 14 days, with only a slightly higher humidity of 75%. For more detailed insights into the weather during this time, you can visit weather in June.
September weather generally features cooler temperatures compared to July, with minimums dipping to 0°C (33°F) and an average of 15°C (60°F), while July boasts a warmer minimum of 9°C (49°F) and an average of 20°C (68°F). In terms of maximum temperatures, September peaks at 28°C (83°F), slightly lower than July's warmest days at 32°C (90°F). Precipitation levels are higher in September at 152 mm (6.0 in) over 13 days, compared to July's 119 mm (4.7 in) over 16 days. Both months maintain the same humidity level at 74%. For more detailed insights, you can check the weather in July.
In comparing the weather of September to August, September exhibits a cooler temperature range, with minimums dropping to 0°C (33°F), an average of 15°C (60°F), and a maximum of 28°C (83°F), whereas August maintains warmer conditions, featuring minimums of 8°C (46°F), an average of 20°C (69°F), and maximums reaching up to 35°C (95°F). Additionally, September experiences slightly more precipitation, totaling 152 mm (6.0 in) over 13 days, compared to August's 125 mm (4.9 in) spread across 15 days. Humidity levels are higher in September at 74%, compared to August's 68%. For a more detailed look at August’s weather, visit weather in August.
In September, the weather typically features a wider range of temperatures, with lows around 0°C (33°F) and highs reaching up to 28°C (83°F), resulting in an average temperature of 15°C (60°F). This month experiences significant rainfall, totaling 152 mm (6.0 in) over 13 days, coupled with a humidity level of 74%. In contrast, October sees cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 23°C (74°F), leading to an average temperature of 10°C (51°F). Rainfall decreases to 87 mm (3.4 in) over 9 days, and humidity rises to 88%. For more details on specific weather patterns, you can refer to the weather in October.
September and November present contrasting weather patterns. In September, temperatures range from a cool 0°C (33°F) at night to a warm 28°C (83°F) during the day, averaging around 15°C (60°F). The month is relatively wet, with 152 mm (6.0 in) of precipitation over about 13 days, accompanied by a moderate humidity level of 74%. In contrast, November experiences lower temperatures, with minimums dropping to -10°C (14°F) and a daytime maximum of 18°C (65°F), resulting in an average of only 6°C (42°F). Although November has slightly less precipitation at 133 mm (5.2 in) over 11 days, the humidity rises to 90%, making the air feel quite damp. For more details, you can check the weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 28°C (83°F), with an average of 15°C (60°F). This month experiences considerable rainfall, totaling 152 mm (6.0 in) over about 13 days, coupled with a moderate humidity level of 74%. In contrast, December sees much colder temperatures, with a minimum of -17°C (1°F) and a maximum of 13°C (55°F), averaging just 1°C (33°F). Precipitation decreases to 111 mm (4.4 in) over 10 days, but humidity rises significantly to 89%. For more details on the weather during December, you can check weather in December.
As summer gives way to autumn, September in Domžale presents a distinct shift in weather patterns. With an average temperature around a mild 15°C (60°F), the warmth of summer still lingers, yet the cooler nights hint at the impending transition to fall. This month experiences an increase in precipitation, with about 152 mm spread over 13 days, contributing to the lush landscapes that define the region during this time. The humidity levels remain relatively high at 74%, further emphasizing the changeover season. This mix of warmth and moisture creates a unique atmosphere, setting September apart from the more extreme conditions of both summer and winter. For a detailed overview of how these changes fit into the broader climate trends, visit Climate.