Last updated: August 27, 2025
In September, Alba Iulia experiences a delightful transition from summer to autumn, with temperatures ranging from a maximum of 32°C (90°F) to a chilly minimum of -1°C (31°F). The average temperature settles around a comfortable 16°C (62°F), making it an ideal time for outdoor exploration. While the month sees 55 mm (2.2 in) of rain over 8 days, the humidity level remains manageable at 58%, ensuring that visitors can enjoy the rich history and stunning landscapes of this charming Romanian city. Whether basking in the warmth of the sun or embracing the cool evenings, September offers a unique blend of weather that enhances the beauty of Alba Iulia.
In September, Alba Iulia transitions from the summer's heat to the crisp embrace of autumn, with temperatures showcasing a delightful range. The month opens with a minimum of -1°C (31°F), defying the lingering warmth of August, while the average temperature settles at a comfortable 16°C (62°F), making it an inviting time for exploration. As the days progress, highs can reach up to 32°C (90°F), offering a final taste of summer warmth before the cooler months set in. This gradual shift in temperature not only marks a change in the season but also highlights the beauty of Alba Iulia's landscape as it prepares for fall, creating a perfect backdrop for outdoor activities and scenic adventures.
September in Alba Iulia, Romania experiences a mild shift in precipitation, with an average of 55 mm (2.2 in) of rainfall over approximately 8 days. This reflects a decrease from the wetter summer months, where a significant 112 mm (4.4 in) was recorded in May and peaks in June at 119 mm (4.7 in). As the city transitions into autumn, the overall precipitation starts to taper off, aligning with historical trends that see October averaging just 45 mm (1.8 in). While September may not be the rainiest month, its relatively light showers can still invigorate the landscape, preparing it for the vibrant colors of fall.
As summer gives way to autumn, September in Alba Iulia experiences a notable shift in humidity, dropping to 58%. This marks a slight increase from the drier days of August, which saw a refreshing 51%, yet it remains significantly lower than the winter months ahead. Throughout the year, humidity levels exhibit a clear trend: starting high in the winter with 91% in January, they gradually decline to their lowest point in July at 65%. However, as autumn settles in, humidity begins to rise again, foreshadowing the wetter months of October and November, when levels soar back to 80% and 88% respectively. This fluctuation reflects Alba Iulia's transitional climate, balancing cooler, crisp days with a hint of lingering warmth from summer.
As September rolls into Alba Iulia, Romania, the UV Index gradually decreases from the peak summer values, standing at 7 this month, which places it in the high exposure category. This is a slight dip from August's 8, yet still highlights the importance of sun safety, especially with a burn time of just 25 minutes for unprotected skin. The trend showcases how the summer months, characterized by very high UV levels in June and July, begin to transition into the milder autumn, while still reminding residents and visitors to remain vigilant against UV exposure. So, whether you're enjoying the last warm days of summer or preparing for fall activities, be sure to check the daily UV Index and protect your skin. For more detailed information, visit Alba Iulia UV Index.
UV Risk Categories
As autumn approaches, September in Alba Iulia, Romania, offers a delightful transition with 337 hours of sunshine, a significant decrease from the sun-soaked peaks of July's 420 hours. This month marks a gentle shift from the summer's bright embrace, as daylight begins to wane, yet still provides ample opportunities for outdoor exploration. Following the lively summer months, September retains a warmth that invites locals and visitors to savor the picturesque landscapes while soaking up the sun, before the more subdued days of October arrive with only 285 hours of light. The gradual decline in sunshine hours throughout the year illustrates a typical seasonal rhythm, showcasing the beauty of change in this charming Romanian city.
In September, Alba Iulia enjoys a notable 49% chance of sunny weather, making it one of the more promising months for sunshine as summer transitions to autumn. This probability reflects a slight dip from the sun-soaked heights of August (57%) but still remains significantly higher than the winter months and early spring. As July and August are the peak months for sun, September maintains a satisfying balance, allowing residents and visitors to savor the last rays of summer before the clouds of October roll in. Overall, as the year progresses, the trend clearly indicates that sun seekers have better luck in the late summer and early autumn compared to earlier months, creating a perfect climate for outdoor activities and exploration.
As the summer months come to a close in Alba Iulia, Romania, September brings a gentle transition, offering around 12 hours of daylight. This reduction in sunlight marks a notable shift from the abundant 15 hours experienced in June and July, gradually easing toward the shorter days of autumn. The trend showcases a steady decline from the peak brightness of summer, yet September’s sunlight still benefits from the lingering warmth, making it a delightful time for outdoor activities. Following this month, daylight dips further, with October providing just 10 hours, signaling the approach of winter's shorter days.
In September, the winds in Alba Iulia, Romania maintain a gentle pace, with an average speed of 1.9 m/s (4 mph). This is a slight uptick from the mild summer months, reflecting a subtle shift as autumn approaches. Throughout the year, wind speeds show a pattern of fluctuating light breezes, peaking at 2.3 m/s during the spring months of April and May. Interestingly, the fall months begin to usher in a gradual increase in wind velocity, hinting at the cooler conditions that characterize the season. As summer fades, September stands as a transition point, where the air carries a refreshing touch, making it a perfect time to enjoy the historic beauty of Alba Iulia against the backdrop of gently swaying trees and whispering winds.
Weather in Alba Iulia varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Alba Iulia, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures can range dramatically, with a minimum of -1°C (31°F), an average of 16°C (62°F), and a maximum of 32°C (90°F), allowing for warm and pleasant days. The month sees an average precipitation of 55 mm (2.2 in) over about 8 days, with humidity around 58%. In contrast, January brings much colder temperatures, with a minimum of -17°C (1°F), an average of -1°C (31°F), and a maximum of only 14°C (57°F). This mid-winter month has slightly lower total precipitation at 42 mm (1.7 in) spread across 10 days, and a markedly higher humidity level of 91%. For more details on the weather patterns in January, you can visit Alba Iulia weather in January.
September and February present markedly different weather conditions. In September, temperatures range from a chilly minimum of -1°C (31°F) to a warm maximum of 32°C (90°F), with an average of 16°C (62°F). The month sees around 55 mm (2.2 in) of precipitation over approximately 8 days, coupled with a moderate humidity of 58%. Conversely, February is far colder, with temperatures dipping to a minimum of -13°C (8°F) and peaking at 18°C (65°F), averaging only 3°C (37°F). Precipitation in February is slightly less at 52 mm (2.0 in) but occurs over a greater number of days—approximately 10—resulting in higher humidity levels of 86%. For a detailed look at February weather in Alba Iulia, check out Alba Iulia weather in February.
In comparing the weather of September and March, it's evident that September tends to be much warmer, with average temperatures sitting at 16°C (62°F) and highs reaching up to 32°C (90°F). In contrast, March experiences significantly cooler temperatures, with an average of only 5°C (42°F) and maximums of 24°C (75°F). September also has lower humidity levels at 58% and less precipitation, averaging 55 mm (2.2 in) over 8 days, whereas March is typically wetter, receiving 63 mm (2.5 in) across 12 days, along with higher humidity at 83%. For more detailed information, you can check out Alba Iulia weather in March.
When comparing the weather in September and April, notable differences emerge. September typically enjoys milder temperatures, with averages around 16°C (62°F) and maximums reaching up to 32°C (90°F), while April is cooler, featuring an average of 10°C (51°F) and maximums of 28°C (82°F). In terms of precipitation, both months are relatively similar, with September receiving about 55 mm (2.2 in) over 8 days, and April closely following with 54 mm (2.1 in) across 11 days. However, April experiences higher humidity levels at 74%, compared to September's 58%. For more details on the weather patterns in April, check out Alba Iulia weather in April.
When comparing the weather in September and May, September tends to offer a wider temperature range, with minimums of -1°C (31°F) and maximums reaching 32°C (90°F), while May's temperatures range from a minimum of 1°C (35°F) to a maximum of 28°C (84°F). Despite September's average temperature being slightly higher at 16°C (62°F) compared to May's 15°C (59°F), May experiences significantly more precipitation, with 112 mm (4.4 in) over 18 days, compared to September's 55 mm (2.2 in) over just 8 days. Additionally, May has higher humidity levels at 70%, whereas September's humidity is lower at 58%. For those interested in detailed weather conditions, you can find more information here: Alba Iulia weather in May.
September and June present contrasting weather patterns. In September, temperatures range from a minimum of -1°C (31°F) to a maximum of 32°C (90°F), with an average of 16°C (62°F), while June enjoys slightly milder and more consistent temperatures, with a minimum of 6°C (44°F) and a maximum of 33°C (91°F), averaging 19°C (67°F). Precipitation is notably heavier in June, totaling 119 mm (4.7 in) over 18 days, compared to September's 55 mm (2.2 in) over just 8 days. Additionally, June tends to be more humid, with an average humidity of 67%, versus September's 58%. For more detailed insights, check out Alba Iulia weather in June.
When comparing the weather in September and July, notable differences emerge in temperature and precipitation. September experiences a broader temperature range, with a minimum of -1°C (31°F) and a maximum of 32°C (90°F), averaging around 16°C (62°F). In contrast, July is warmer, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 34°C (94°F), and an average of 20°C (69°F). Moreover, July sees significantly higher precipitation, accumulating 103 mm (4.1 in) over 16 days, compared to September's 55 mm (2.2 in) across 8 days. The humidity levels are also slightly higher in July at 65%, while September has a humidity of 58%. For more details about July weather, you can check Alba Iulia weather in July.
Comparing the weather in September and August reveals a notable shift in temperatures and precipitation patterns. September experiences a wider temperature range, with minimums dipping to -1°C (31°F), while the average temperature settles at a milder 16°C (62°F), peaking at 32°C (90°F). In contrast, August boasts higher average temperatures, with a minimum of 9°C (48°F) and a maximum reaching up to 37°C (99°F), resulting in an overall warmer climate. Additionally, September sees slightly less precipitation at 55 mm (2.2 in) over 8 days, compared to August's 67 mm (2.6 in) over 11 days, despite having higher humidity levels at 58% versus August's 51%. For a more detailed look at August's weather, visit Alba Iulia weather in August.
September and October showcase a noticeable shift in weather patterns. In September, temperatures range from a chilly minimum of -1°C (31°F) to a warm maximum of 32°C (90°F), with an average of 16°C (62°F). During this month, precipitation averages 55 mm (2.2 in) over 8 days, and humidity sits at 58%. In contrast, October features cooler temperatures, with a minimum still at -1°C (31°F) but a drop in the average to 11°C (52°F) and a maximum of 26°C (80°F). Rainfall decreases slightly to 45 mm (1.8 in) over just 6 days, while humidity rises significantly to 80%. For a detailed look at the weather in October, check out Alba Iulia weather in October.
September and November present contrasting weather conditions. In September, temperatures range from a minimum of -1°C (31°F) to a maximum of 32°C (90°F), with an average of 16°C (62°F). This month features 55 mm (2.2 in) of precipitation over 8 days and a relatively comfortable humidity level of 58%. In stark contrast, November brings a notable drop in temperature, with lows reaching -6°C (21°F) and highs capping at 23°C (74°F), resulting in a cooler average of 6°C (44°F). With 44 mm (1.7 in) of precipitation spread over 11 days and increased humidity at 88%, November feels distinctly wetter and chillier. For more detailed insights, check out Alba Iulia weather in November.
In September, the weather showcases a broader temperature range, with minimums dipping to -1°C (31°F) and maximums reaching a warm 32°C (90°F), making it a month of varying climates. In contrast, December presents a much colder atmosphere, with temperatures ranging from a frigid -11°C (12°F) to a maximum of only 14°C (57°F), indicating a significant drop in warmth. While September experiences moderate precipitation of 55 mm (2.2 in) over about 8 days, December sees an increase in both precipitation and frequency, totaling 75 mm (3.0 in) across 15 days, and a notable rise in humidity, reaching 90%. For a detailed look at conditions, visit Alba Iulia weather in December.
As summer transitions to autumn, September in Alba Iulia presents a delightful shift in weather. The month enjoys warm days with maximum temperatures reaching 32°C (90°F), yet cool evenings invite cozy sweaters as nighttime temperatures can dip to around 1°C (31°F). This blend of warmth and chill, coupled with moderate humidity at 58%, makes September a refreshing chapter distinct from the sweltering heat of summer months. Although 8 days of precipitation are expected, the overall weather remains comfortably pleasant, striking a perfect balance. For a deeper understanding of how September fits into the annual weather cycle, explore our comprehensive guide to the Alba Iulia Climate.