Last updated: August 27, 2025
September weather in Nova Gorica, Slovenia offers a delightful transition from summer to autumn, with maximum temperatures reaching 30°C (87°F) and averaging around 16°C (62°F). As the month progresses, temperatures can dip to a brisk 3°C (37°F), providing a refreshing contrast. Residents and visitors can expect about 188 mm (7.4 in) of rain spread over 12 days, creating a tapestry of lush landscapes. With humidity levels hovering at 64%, the air maintains a pleasant and invigorating feel, making September a captivating time to experience this charming Slovenian town.
As summer transitions to autumn in Nova Gorica, Slovenia, September brings a delightful mix of warmth and coolness. With temperatures ranging from a comfortable 3°C (37°F) at night to a pleasant 30°C (87°F) during the day, this month strikes a balance that appeals to both outdoor enthusiasts and those seeking relaxation. The average temperature of 16°C (62°F) indicates a gradual cooling from August's heat, yet still allows for many sunny days perfect for exploring the beautiful landscapes. As autumn approaches, visitors can enjoy the tail end of summer vibes, making September a prime time for outdoor activities amidst the stunning Slovenian scenery.
In September, Nova Gorica experiences a significant uptick in precipitation, with 188 mm (7.4 in) of rain, marking it as one of the wettest months of the year. This surge in rainfall is reflected in the 12 days of precipitation, maintaining a consistent pattern seen from July through October, where rainfall remains robust. Following the dry summer months of June through August, September’s wetter climate heralds the onset of autumn, setting the stage for the even higher averages in the forthcoming months of October and November. As nature shifts toward its cooler phase, this transition is not just marked by falling leaves but also by the increased likelihood of rain, painting a vivid picture of seasonal change in this charming Slovenian city.
As September rolls into Nova Gorica, the air begins to feel a touch more humid, registering at 64%. This marks a shift from the summer months, where humidity dipped to a refreshing 51% in August, offering a respite from the more oppressive levels earlier in the year. Nonetheless, September's humidity is relatively moderate compared to the winter months ahead, which see a notable rise, peaking at 89% in November. This transitional period hints at the impending coolness of autumn, while still retaining a hint of the summer's warmth, creating a unique blend of comfort and freshness in the atmosphere.
In September, Nova Gorica experiences a UV Index of 7, indicating a high exposure category, and a burn time of about 25 minutes. As the summer heat wanes, this month smoothly transitions from the peak UV levels of August and July, both at 9, to a slightly more moderate intensity. Interestingly, while the UV Index decreases from the summer's very high ratings, it remains significant, reminding residents and visitors to remain vigilant about sun protection. As autumn approaches, the UV levels will continue to drop, leading to a welcomed return to more moderate exposure, but September's lingering warmth keeps outdoor activities inviting. For real-time updates and to plan your outings, check out the comprehensive Nova Gorica UV Index.
UV Risk Categories
September in Nova Gorica offers a delightful balance of sunshine, with 320 hours of glorious light illuminating the changing landscapes. Following the peak of summer in July, which boasts an impressive 425 hours of sunshine, the daylight begins to taper off, yet September still retains a warm, inviting glow. The month stands out as the transition from the sun-drenched days of summer to the cooler embrace of autumn, showcasing a significant sunlit backdrop that can be particularly enchanting for outdoor activities. As the days shorten and lead into October, where sunshine dips to 284 hours, September serves as a beautiful reminder of summer's vitality, making it an ideal time to explore the region's stunning scenery under the bright, autumnal skies.
In September, Nova Gorica experiences a notable shift in weather, boasting a 50% chance of sunny days. This marks a transition from the summer months, where the sun shines with a 46% to 49% probability from July to August, reflecting a more favorable end-of-summer climate. As the seasons change, September stands out as a month where sunny weather peaks just above the seasonal average, offering locals and visitors alike a delightful opportunity to enjoy the lingering warmth before autumn settles in. This trend suggests that while early autumn may usher in cooler temperatures, it also holds the promise of beautiful, sunlit days perfect for outdoor activities.
As summer gracefully transitions into autumn, September in Nova Gorica unveils a delightful balance of daylight, offering 12 hours of light to embrace the day. This marks a gentle decline from the sun-soaked heights of 15 hours seen in the peak months of June and July, while still providing ample opportunity for outdoor adventures. As the year progresses toward October, when daylight dips to 10 hours, September serves as a reminder of the warmth and brightness of summer, capturing the enchanting interplay between the lingering light and the approaching chill of fall.
In September, the gentle breeze in Nova Gorica, Slovenia continues a trend of mild wind speeds characteristic of the summer months, averaging 1.7 m/s (4 mph). This slight decline from the summer highs reflects a seasonal transition, as the region's wind begins to pick up again in the fall months ahead. Overall, the steady averages throughout the year, with most months hovering around 1.8 m/s (4 mph), evoke a sense of calm that complements the picturesque landscapes of this charming city. As autumn unfolds, one can expect the wind to gradually strengthen, with October and November promising a note of invigorating freshness as average speeds increase to 2.4 m/s (5 mph), heralding the change of seasons.
Weather in Nova Gorica varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Nova Gorica, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present dramatically different weather conditions. In September, temperatures range from a mild 3°C (37°F) at night to a warm 30°C (87°F) during the day, with an average of 16°C (62°F). This month typically sees 188 mm (7.4 in) of rainfall over 12 days, with humidity levels at 64%, making it feel fairly comfortable. In contrast, January is much colder, with a minimum temperature of -11°C (13°F) and a maximum of just 11°C (52°F), averaging around 1°C (35°F). Precipitation is significantly less, at 73 mm (2.9 in) over about 7 days, but the humidity is much higher at 88%, contributing to the chilly feel of the month. For more details about January weather in Nova Gorica, you can check this link: Nova Gorica weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a cool 3°C (37°F) at night to a warm 30°C (87°F) during the day, with an average of 16°C (62°F). The month experiences considerable rainfall, totaling 188 mm (7.4 in) over about 12 days, while humidity is a moderate 64%. In stark contrast, February sees much colder conditions, with minimum temperatures plummeting to -10°C (14°F) and a daytime maximum of 20°C (68°F), averaging around 4°C (39°F). Despite receiving less precipitation at 142 mm (5.6 in) over 11 days, February's humidity is notably higher at 82%. This highlights a shift from the mild, humid late summer to the chilly, damp winter period. For more specific details on February weather, visit Nova Gorica weather in February.
The comparison between September and March weather reveals significant differences in temperature and climate. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 30°C (87°F), with an average of 16°C (62°F) and a total precipitation of 188 mm (7.4 inches) over 12 rainy days. In contrast, March features a colder climate, with temperatures ranging from a brisk -16°C (4°F) to a maximum of 22°C (72°F), averaging around 6°C (43°F). The total precipitation for March is lower at 111 mm (4.4 inches) over just 11 days. Additionally, March exhibits a slightly higher humidity level of 73% compared to September's 64%. For more detailed information, you can check Nova Gorica weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a minimum of 3°C (37°F) to a maximum of 30°C (87°F), with an average temperature of 16°C (62°F). The month sees a total precipitation of 188 mm (7.4 in) over 12 days, coupled with a humidity level of 64%. In contrast, April experiences cooler temperatures, with a minimum of -7°C (20°F) and a maximum of 26°C (79°F), averaging 10°C (51°F). It has slightly less precipitation at 149 mm (5.9 in) over the same number of days, but with higher humidity at 73%. For more detailed weather insights, check Nova Gorica weather in April.
When comparing the weather of September and May, it's evident that both months feature a significant range in temperatures and precipitation. In September, the temperatures typically range from a chilly 3°C (37°F) in the early mornings to a warm 30°C (87°F) during the day, with an average of 16°C (62°F). In contrast, May starts slightly cooler with minimums around 2°C (36°F) and peaks at 26°C (79°F), averaging 14°C (58°F).
Precipitation levels also differ, with September receiving 188 mm (7.4 in) over 12 days, while May sees a higher total of 233 mm (9.2 in) across 21 days, resulting in somewhat wetter conditions. Humidity is generally higher in May at 70% compared to 64% in September. For a detailed look at weather patterns, you can refer to Nova Gorica weather in May.
September and June present distinct weather patterns, showcasing a transition from the warm summer months to the cooler autumn season. In September, temperatures range more widely, with a minimum of 3°C (37°F) and a maximum of 30°C (87°F), resulting in an average temperature of 16°C (62°F). This month experiences higher precipitation, totaling 188 mm (7.4 in) over 12 days, accompanied by a humidity level of 64%. In contrast, June boasts milder temperatures, with a minimum of 7°C (44°F) and maximum reaching 35°C (96°F), averaging 20°C (68°F). Precipitation in June is lower at 134 mm (5.3 in), although it still occurs over the same number of days. Humidity is slightly higher in June at 69%, but overall, the weather feels warmer and more stable compared to the variability of September. For more details, check Nova Gorica weather in June.
September and July present quite contrasting weather patterns. In September, temperatures range from a cooler minimum of 3°C (37°F) to a warmer maximum of 30°C (87°F), with an average of 16°C (62°F), while July boasts milder temperatures, starting at a minimum of 11°C (52°F) and peaking at 34°C (94°F), averaging 21°C (70°F). Despite September experiencing higher precipitation at 188 mm (7.4 in) over 12 days, July has notable rainfall as well, accumulating 129 mm (5.1 in) over 15 days. Humidity levels remain similar, at 64% in September and a slightly lower 63% in July. For more detailed information, you can check Nova Gorica weather in July.
September's weather in Nova Gorica is characterized by cooler temperatures and higher precipitation compared to August. The minimum temperature drops to 3°C (37°F), with an average of 16°C (62°F) and a maximum reaching 30°C (87°F). In contrast, August records a milder temperature range, with lows of 9°C (49°F), an average of 21°C (71°F), and a maximum of 34°C (94°F). Additionally, September experiences more rainfall, with 188 mm (7.4 in) over 12 days, while August sees only 123 mm (4.8 in) across 14 days. This is coupled with a notable increase in humidity in September at 64%, compared to August's more comfortable 51%. For more detailed information on August's weather, visit Nova Gorica weather in August.
September weather is characterized by a wider temperature range, with minimums reaching 3°C (37°F) and maximums peaking at 30°C (87°F), resulting in an average of 16°C (62°F). This month also experiences considerable rainfall, totaling 188 mm (7.4 in) over approximately 12 days while maintaining a moderate humidity of 64%. In contrast, October sees a notable drop in temperatures, with minimums around 1°C (35°F) and maximums of 23°C (73°F), leading to an average of 12°C (53°F). Although October receives slightly less precipitation at 151 mm (6.0 in) over 11 days, the humidity rises to 83%, creating a more intense feeling of dampness. For more detailed weather insights, you can refer to Nova Gorica weather in October.
September and November present quite a contrast in weather conditions. In September, temperatures typically range from a mild 16°C (62°F) on average, with highs reaching up to 30°C (87°F), making it a warm month with a fair amount of sunshine. However, it also sees significant rainfall, with 188 mm (7.4 in) accumulating over approximately 12 days and humidity averaging around 64%.
In stark contrast, November brings cooler temperatures, with averages dropping to about 7°C (45°F) and nightly lows dipping to -4°C (25°F). This month's precipitation increases slightly to 209 mm (8.2 in) over 13 days, and humidity rises significantly to 89%, creating a much wetter and more overcast atmosphere. For more specific insights into November weather, check Nova Gorica weather in November.
September and December present stark contrasts in weather. In September, temperatures range from a mild 3°C (37°F) at night to a warm 30°C (87°F) during the day, with an average of 16°C (62°F). The month sees significant rainfall, totaling 188 mm (7.4 in) over 12 days, and a moderate humidity level of 64%. In contrast, December experiences much colder temperatures, with lows reaching -8°C (19°F) and highs peaking at just 12°C (54°F), averaging around 3°C (37°F). Precipitation is slightly lower at 186 mm (7.3 in) but occurs over one less day (11 days) and is accompanied by increased humidity at 88%. For more information on December conditions, you can check Nova Gorica weather in December.
As summer transitions into autumn, September in Nova Gorica offers a unique blend of warm days and cooler nights, setting it apart from the earlier months of summer. With maximum temperatures often reaching a pleasant 30°C (87°F) and average lows dipping to a crisp 3°C (37°F), it's a time when outdoor activities can be enjoyed without the sweltering heat of July and August. However, it's also notable for its increase in rainfall, with 188 mm (7.4 in) of precipitation over about 12 days, making it one of the wetter months. The humidity levels, while moderate at 64%, contribute to that fresh autumn feel, creating a picturesque backdrop for visitors and locals alike. For a deeper understanding of how September fits into the overall climate of the region, explore Nova Gorica Climate.