Last updated: August 27, 2025
September in Slovenia offers a delightful transition from summer to autumn, with maximum temperatures peaking at 28°C (82°F) and an average of 14°C (57°F). While the days remain pleasantly warm, the nights can be cooler, dipping to a minimum of 0°C (31°F). This month also brings considerable moisture, with precipitation measuring 168 mm (6.6 in) over approximately 14 days, contributing to the lush landscapes the country is known for. With a humidity level hovering around 74%, visitors can expect a refreshing atmosphere, making it an ideal time to explore Slovenia’s stunning natural beauty.
In September, Slovenia transitions gracefully from the warmth of summer to the crispness of autumn. With minimum temperatures averaging around 0°C (31°F) and maximums peaking at 28°C (82°F), the month offers a delightful mix of mildness and warmth. The average temperature settles at a comfortable 14°C (57°F), making outdoor activities particularly enjoyable. As the days shorten, the cool evenings invite cozy gatherings, while the lush landscapes begin to showcase hints of autumn’s color palette. This blend of warmth and cooling air creates a perfect backdrop for those looking to experience Slovenia's serene beauty before the chill of winter sets in.
In September, Slovenia experiences a significant transition in its precipitation patterns, recording 168 mm (6.6 in) of rain over 14 days. This marks a slight decrease from the wetter months of July and August, yet it remains a substantial amount, illustrating the lingering summer showers as autumn approaches. The late summer months, characterized by higher precipitation, gradually give way to a drier October, suggesting a shift toward more stable weather conditions. With September's rainfall still considerable, it highlights the region's potential for vibrant foliage as the leaves begin to change, inviting both locals and visitors to appreciate nature's beauty before the winter chill sets in.
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 gives way to autumn in Slovenia, September witnesses a UV Index of 6, categorizing sun exposure as high. While this represents a decrease from the very high levels seen in the peak months of June, July, and August, it still necessitates caution as the burn time shortens to 25 minutes. This transition marks a notable trend where exposure highlights the importance of sun safety practices; even as temperatures begin to cool, the potential for skin damage remains significant. If you're planning outdoor activities, staying informed about the UV Index is essential for healthy sun habits. For more details, check out the UV Index.
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As summer edges into autumn, September in Slovenia still enjoys a delightful 306 hours of sunshine, albeit a noticeable decline from the sun-drenched heights of July and August. This month marks the transition from the peak of summer with its 414 hours in July, gradually tapering off as the days grow shorter. With the bright rays of May and June leading the charge, September retains a remarkable amount of sun, making it an ideal time for outdoor activities amid the picturesque autumn scenery. While daylight diminishes into the cozy embrace of October's 272 hours, September still shines as a bridge between the vibrant summer days and the crisp fall ambiance, inviting visitors to bask in its warm glow before winter approaches.
In Slovenia, the odds of enjoying sunny weather in September stand at a promising 45%, making it one of the more favorable months for clear skies. This figure reflects a slight dip from the summer peak, as July and June offer higher chances of sunshine at 44% and 48%, respectively. However, September's sunlit days carry the charm of early autumn, where outdoor activities can still thrive before the chill of October settles in with a 33% chance of sun. Overall, September strikes a sweet balance, maintaining a commendable likelihood of sunshine while inviting the onset of fall.
As summer gracefully transitions into autumn, September in Slovenia offers a delightful 12 hours of daylight, marking a gradual decline from the sun-drenched days of July and August, which boast 15 hours of light. This month serves as a bridge between the vibrant long days of summer and the shorter, cozier days of fall. Following the peak daylight duration in June, visitors can observe that as nature begins to prepare for the cooler months ahead, daylight starts to wane. The steady decrease in daylight hours that commenced in late summer highlights the seasonal rhythm, inviting both locals and travelers to savor the perfect balance of warmth and evening sunsets before the days shrink further into October's 10 hours of light.
As September rolls into Slovenia, the gentle breeze ushers in the early hints of autumn with an average wind speed of 1.5 m/s (3 mph). This slight decrease from the warmer summer months reflects a transitional period, where the winds shift from the more robust currents of July and August. Here, the subtle whispers of change in the air mirror the gradual retreat of warmer weather, suggesting a softening of the season. Interestingly, September’s winds remain consistent with the preceding months, maintaining a calm atmosphere that encourages leisurely strolls through the picturesque landscape. As October approaches, winds are expected to pick up slightly, reviving energy in the air just as the leaves begin to transform, making the subtle September breeze a captivating prelude to the vibrant autumn ahead.
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.
September and January present stark contrasts in weather patterns. In September, temperatures range from a chilly 0°C (31°F) at night to a warm 28°C (82°F) during the day, with an average of 14°C (57°F). This month sees significant rainfall, with 168 mm (6.6 in) of precipitation over about 14 days, contributing to a humidity level of 74%. In contrast, January is much colder, with temperatures dipping as low as -22°C (-8°F) and averaging -2°C (28°F) during the day. Precipitation is significantly lower at 38 mm (1.5 in) over just 5 days, and humidity rises to 91%. For more detailed information, you can explore weather in January.
In September, temperatures often range from a cool 0°C (31°F) at night to a warm 28°C (82°F) during the day, with an average of 14°C (57°F). The month typically experiences significant rainfall, totaling 168 mm (6.6 in) across 14 days, coupled with a humidity level of 74%. In contrast, February's weather is much colder, with temperatures dipping as low as -16°C (3°F), peaking at 18°C (64°F) and averaging around 1°C (34°F). Despite lower total precipitation of 64 mm (2.5 in) over just 8 days, February's humidity is higher at 87%. This stark contrast highlights September's warmer, wetter climate compared to the frigid and drier conditions of February. For more detailed insights into February's climate, check out weather in February.
September and March showcase contrasting weather patterns, reflecting the transition from summer to autumn and winter to spring, respectively. In September, temperatures range from a chilly 0°C (31°F) to a warm 28°C (82°F), averaging around 14°C (57°F), with significant humidity at 74% and considerable precipitation of 168 mm (6.6 in) over 14 days. In contrast, March is markedly colder, with temperatures dipping from a minimum of -17°C (1°F) to a maximum of 20°C (69°F), while averaging just 4°C (39°F). March experiences less precipitation, totaling 66 mm (2.6 in) across 12 days, but has higher humidity levels at 82%. For a detailed look at the weather specifics, check the weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a chilly 0°C (31°F) at their lowest to a warm 28°C (82°F) at their peak, averaging around 14°C (57°F). This month also sees a higher level of precipitation at 168 mm (6.6 in), with rain occurring on about 14 days and humidity levels averaging 74%. In contrast, April typically experiences lower temperatures, with a minimum of -15°C (6°F) and a maximum of 26°C (78°F), averaging around 8°C (47°F). The precipitation is significantly less at 97 mm (3.8 in) over 13 days, coupled with slightly higher humidity at 79%. For a detailed overview, you can check the weather in April.
In comparing the weather of September and May, we see some notable similarities and differences. Both months experience a range of temperatures, with September having slightly warmer averages, reaching a maximum of 28°C (82°F), compared to May's 27°C (82°F). However, May tends to have a slightly lower average temperature of 12°C (55°F) versus September's 14°C (57°F). Precipitation levels are higher in May, measuring 184 mm (7.3 in) over 21 days, compared to September's 168 mm (6.6 in) over 14 days. Interestingly, humidity remains consistent at 74% for both months, creating a similar feel in the air despite the variations in temperature and rainfall. For more detailed information, you can check the weather in May.
When comparing the weather in September and June, notable differences emerge. September often experiences a wider temperature range, with minimum temperatures dropping to 0°C (31°F) and maximums reaching up to 28°C (82°F). In contrast, June tends to be warmer overall, averaging 18°C (64°F) with max temperatures peaking at 33°C (92°F). Although September has a slightly higher precipitation level at 168 mm (6.6 in) over 14 days, June also sees considerable rain, totaling 137 mm (5.4 in) over 17 days. Humidity levels remain comparable in both months, with June at 75% and September at 74%. For a closer look at June's climate specifics, check out the following link: weather in June.
When comparing the weather in September to that of July, significant differences in temperature and precipitation come to light. September experiences a wider temperature range, with minimums dropping to 0°C (31°F) and maximums reaching 28°C (82°F), averaging around 14°C (57°F). In contrast, July is warmer, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 31°C (88°F) and an average of 19°C (66°F). Both months share high humidity levels at 74%, but September sees slightly less precipitation, totaling 168 mm (6.6 in) over 14 rainy days, compared to July, which has 175 mm (6.9 in) over 17 days. For a more detailed look at July's weather patterns, visit weather in July.
In September, the weather tends to cool down compared to August, with average temperatures dropping from 19°C (66°F) in August to 14°C (57°F) in September. Additionally, minimum temperatures in September reach as low as 0°C (31°F), whereas August remains milder with a minimum of 6°C (43°F). Precipitation is slightly lower in September, totaling 168 mm (6.6 in) over 14 days, compared to 180 mm (7.1 in) over 17 days in August. However, September's humidity increases to 74%, making the air feel a bit more damp than in August, which has a humidity level of 68%. For more detailed information, you can visit the weather in August.
September's weather is characterized by warmer temperatures, with averages around 14°C (57°F) and peaks reaching up to 28°C (82°F). However, it also experiences considerable rainfall, totaling 168 mm (6.6 in) over approximately 14 days, coupled with a humidity level of 74%. In contrast, October sees a notable drop in temperatures, with an average of 9°C (49°F), while the maximum temperature reaches only 22°C (71°F). The month is also drier, recording 78 mm (3.1 in) of precipitation over 10 days, though the humidity rises to 88%. For a detailed look at the weather trends, you can check weather in October.
September and November present contrasting weather patterns, reflecting the shift from late summer to late autumn. In September, temperatures range from a comfortable minimum of 0°C (31°F) to a pleasant maximum of 28°C (82°F), with an average of 14°C (57°F). The month experiences significant precipitation, totaling 168 mm (6.6 in) over 14 days, coupled with a moderate humidity level of 74%.
In stark contrast, November brings colder temperatures, with a minimum dipping to -13°C (8°F) and an average of just 4°C (40°F). Although the maximum reaches a milder 19°C (67°F), the overall climate is considerably chillier. Precipitation decreases to 106 mm (4.2 in) across 10 days, yet humidity rises to 90%, contributing to a damp and crisp atmosphere. For a detailed overview of November weather, visit weather in November.
September and December depict a stark contrast in weather conditions. In September, temperatures range from a mild 0°C (31°F) to a warm 28°C (82°F), with an average of 14°C (57°F). The month experiences considerable precipitation, totaling 168 mm (6.6 in) over approximately 14 days, accompanied by a humidity level of 74%. On the other hand, December brings a much colder climate, with temperatures fluctuating between a chilly -17°C (1°F) and a max of 11°C (52°F), averaging around -1°C (30°F). Precipitation decreases to 88 mm (3.5 in) over 10 days, while humidity rises to 89%, creating a more layered and frosty atmosphere. For more specific details on weather conditions, you can visit weather in December.
As summer transitions to autumn, September presents a remarkable shift in weather patterns that sets it apart from the warmer months. With temperatures averaging around 14°C, it feels significantly cooler, marking the onset of a refreshing chill in the air. The increased humidity of 74% often leads to cozy, misty mornings and a vibrant landscape brimming with changing foliage. Additionally, the 14 days of rainfall contribute to a lush environment, contrasting sharply with the drier spells experienced in the height of summer. For those keen on understanding the climatic nuances of this beautiful region, exploring more about Climate can offer deeper insights into the evolving weather patterns.