Last updated: August 27, 2025
September weather in București, Romania showcases a delightful transition from the sweltering summer heat to a more moderate climate. The month boasts a maximum temperature reaching up to 36°C (97°F), while the average temperature settles comfortably around 20°C (68°F). Nights can be brisk, with temperatures dipping to a minimum of 1°C (35°F). Rain is scarce, with just 23 mm (0.9 in) of precipitation spread across 3 days, accompanied by a humidity level of 57%. This blend of warmth and crispness makes September an appealing time to explore the vibrant streets of București.
In September, temperatures in București begin to showcase the transition from the sweltering summer months to the cooler embrace of autumn. With a minimum temperature of 1°C (35°F) and an average hovering around 20°C (68°F), the city experiences pleasant days and cool evenings. The maximum temperature can reach a warm 36°C (97°F), reflecting the tail end of summer's heat. This month stands out with a balanced climate that invites outdoor activities as the foliage starts to shift into stunning hues, making it an ideal time for both locals and tourists to explore the city's charm before the chill of October sets in. Overall, September offers a delightful blend of warmth and crispness, highlighting a gradual cooling trend leading into fall.
In September, Bucuresti experiences a notable decrease in precipitation, with only 23 mm (0.9 in) recorded over just 3 days. This marks a significant drop from the summer months, where rainfall peaks, particularly in June with 115 mm. The transition into early autumn sets a drier tone, as September's rainfall is among the lowest of the year, following the humid days of August. The less frequent precipitation not only signals the gradual onset of fall but also hints at the changing climate patterns as the city approaches the wetter months ahead in October and November.
As summer fades, September in Bucuresti, Romania welcomes a noticeable change in humidity levels, settling at 57%. This marks a significant transition from the drier August, which recorded a low 48%, and sets the stage for the more humid autumn months. The trend reveals a gradual upward shift in moisture levels, echoing the characteristic patterns of the region. From the high humidity of winter months, dropping to a summer low, September serves as a gentle reminder of the impending return to a more humid climate as October follows closely with 79%. This shift not only affects the weather but also the vibrant atmosphere of the city, as it prepares for the colorful fall.
As summer fades and September arrives in Bucuresti, the UV Index begins to dip slightly, reflecting a transition toward cooler months. With a UV Index of 7, this month falls into the high exposure category, indicating a burn time of about 25 minutes for unprotected skin. Although this is a decrease from the peak summer indices of 9, it still calls for caution when spending time outdoors. As the days shorten and the intensity of the sun weakens, remember that UV rays can still pose a significant threat. Stay informed and protect your skin by checking the current levels at Bucuresti UV Index.
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As summer gently transitions into autumn, September in București offers a comforting embrace of 343 hours of sunshine, making it a delightful month for outdoor activities. This pleasant figure follows a peak in July with 425 hours, showcasing the height of summer bliss. While September marks a step down from August's 406 hours, the sunlight remains generous compared to the earlier months of the year, such as January with only 169 hours. The month stands out as a lovely blend of mild warmth and increased daylight, reminiscent of the vibrant energy that blankets the city during the summer months, before the shorter days of October, with 288 hours, signal the onset of fall.
As summer transitions into fall, September in Bucharest offers a delightful balance of sunshine and mild weather. With a 59% chance of sunny days, this month represents a notable shift from the peak summer months of July and August, which enjoy a robust 70% likelihood of sun. While the transition brings a slight decrease in sunny weather compared to the summer, September still stands out as a pleasant time to bask in the lingering warmth before autumn sets in. As temperatures begin to cool, residents and visitors alike can still relish the golden rays of the sun, making it a perfect month for outdoor activities amidst the breathtaking change of seasons.
As the summer days begin to wane in Bucuresti during September, daylight hours steadily decrease to approximately 12 hours. This month marks a gentle transition from the sun-drenched days of July and August, where daylight peaks at 15 hours. Following the vibrant spring months that usher in longer evenings, September offers a comforting balance before plunging into the shorter daylight periods of fall and winter. October further reduces daylight to 10 hours, hinting at the gradual shift to the colder months ahead. This rhythmic ebb and flow of daylight highlights Bucuresti's unique seasonal charm, inviting residents and visitors to savor the warm hues of autumn before the darker days of winter set in.
In September, Bucharest experiences a gentle shift in its wind patterns, with an average wind speed of 2.6 m/s (6 mph). This slight increase from the summer months reflects a gradual transition towards the crispness of autumn. As the winds pick up just a notch from August’s 2.3 m/s (5 mph), the city begins to embrace the refreshing breezes that hint at the changing season ahead. Notably, September still maintains a moderate quintessence, aligning closely with its neighboring months of April and May, where wind conditions remain mild. This pattern suggests that while warmer days linger, the arrival of fall is subtly ushered in by these soft yet invigorating winds, inviting both locals and visitors to revel in the beauty that Bucharest has to offer during this time of year.
Weather in Bucuresti varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bucuresti, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present two starkly contrasting weather experiences. In September, temperatures can range from a mild 1°C (35°F) during the night to a warm average of 20°C (68°F) by day, peaking at a sizzling 36°C (97°F) occasionally. With only 23 mm (0.9 in) of precipitation over about 3 days and a humidity level of 57%, September often feels quite pleasant. Conversely, January brings frigid conditions, with temperatures dipping as low as -23°C (-9°F) and averaging around 0°C (32°F). The month sees more precipitation at 40 mm (1.6 in) over approximately 7 days, coupled with higher humidity at 88%, contributing to a much colder and more damp atmosphere. For those interested in an in-depth look at January weather specifics, check out Bucuresti weather in January.
September and February showcase contrasting weather patterns. In September, temperatures range from a low of 1°C (35°F) to a high of 36°C (97°F), with an average of 20°C (68°F) and relatively low precipitation of 23 mm (0.9 in) over just 3 days. Humidity sits at a moderate 57%, making it a pleasant month for outdoor activities. In stark contrast, February brings much colder conditions, with minimum temperatures plunging to -14°C (6°F) and an average of just 3°C (37°F). The maximum temperature reaches 21°C (69°F), but the higher precipitation of 43 mm (1.7 in) over 8 days and increased humidity at 85% create a damp, chilly atmosphere. For more details on February weather, you can visit Bucuresti weather in February.
September and March present contrasting weather experiences, showcasing the transition from summer to winter. In September, temperatures can soar, with a minimum of 1°C (35°F) and an average reaching up to 20°C (68°F), peaking at a high of 36°C (97°F). This month typically sees only 23 mm (0.9 in) of precipitation over about 3 days, accompanied by a moderate humidity level of 57%. In stark contrast, March is marked by much colder temperatures, where the minimum drops to -19°C (-2°F) and the average settles around 6°C (44°F), with a maximum of 25°C (77°F). March is also wetter, receiving 61 mm (2.4 in) of rain over 9 days, and features a higher humidity at 82%. For more insights into how weather varies, take a look at Bucuresti weather in March.
September and April showcase contrasting weather patterns, with September typically experiencing higher temperatures. In September, the temperatures range from a cool 1°C (35°F) to a warm 36°C (97°F), with an average of 20°C (68°F) and minimal precipitation at 23 mm over just 3 days. In contrast, April features a cooler temperature spectrum, with a minimum of -1°C (30°F) and a maximum of 29°C (84°F), averaging 12°C (54°F). The month sees more rain, with precipitation totaling 44 mm across 7 days, and higher humidity at 73%. For those interested in more detailed insights on April weather in București, check out this link: Bucuresti weather in April.
When comparing the weather in September and May, September tends to present a wider temperature range, with minimums dipping to 1°C (35°F) and maximums soaring to 36°C (97°F), resulting in a comfortable average of 20°C (68°F). In contrast, May offers milder conditions, with minimums of 4°C (39°F) and maximums reaching 31°C (88°F), yielding an average temperature of 17°C (63°F). Precipitation is another distinguishing factor; September sees only 23 mm (0.9 in) over just 3 days, while May experiences significantly more rainfall at 69 mm (2.7 in) spread across 11 days. Additionally, humidity levels are higher in May at 71%, compared to September's 57%. For more details, you can visit Bucuresti weather in May.
In comparing the weather of September and June, we can observe notable differences in temperature and precipitation patterns. September sees a wider temperature range with a minimum of 1°C (35°F) and a maximum of 36°C (97°F), averaging around 20°C (68°F), while June has a milder minimum temperature of 7°C (46°F) and a slightly higher maximum of 37°C (99°F), with an average temperature of 22°C (71°F). Rainfall is significantly lower in September, with only 23 mm (0.9 in) over three days, compared to June's substantial 115 mm (4.5 in) spread over 15 days. Furthermore, humidity levels are higher in June at 70%, compared to September's 57%. For more details about June weather, you can visit Bucuresti weather in June.
In comparing the weather conditions of September and July, September experiences a broader temperature range with minimums dropping to 1°C (35°F) and maximums reaching up to 36°C (97°F), while the average temperature settles around 20°C (68°F). In contrast, July showcases a milder minimum of 12°C (54°F) and a higher average of 24°C (75°F), peaking at 38°C (100°F). Additionally, July is notably wetter, with 90 mm (3.5 in) of precipitation over 10 days, compared to September’s drier climate that sees only 23 mm (0.9 in) over 3 days. Humidity levels are also higher in July at 66%, whereas September maintains a slightly lower humidity of 57%. For more detailed insights, you can check Bucuresti weather in July.
When comparing the weather in September to August, we notice a significant shift in temperature and humidity. September offers lower minimum temperatures, starting at 1°C (35°F), compared to August's milder 11°C (52°F). The average temperature in September is also cooler at 20°C (68°F) versus August's 25°C (77°F). However, September features a wider range, with maximum temperatures reaching up to 36°C (97°F), while August can peak even higher at 38°C (101°F). Additionally, September experiences slightly less precipitation, totaling 23 mm (0.9 in) over 3 days, compared to August's 33 mm (1.3 in) over 6 days. Interestingly, September also has a higher humidity level at 57%, compared to August's 48%. For more details on August weather, check out Bucuresti weather in August.
In September, the weather is characterized by a wider range of temperatures, with minimums dipping to 1°C (35°F) and maximums soaring up to 36°C (97°F), while averaging around 20°C (68°F). The month experiences relatively low precipitation, totaling 23 mm (0.9 in) over just 3 days, and maintains a moderate humidity level of 57%. In contrast, October sees a more consistent but cooler temperature range, with a minimum of 1°C (33°F) and a maximum of 31°C (87°F), averaging only 13°C (56°F). The month is considerably wetter, with precipitation rising to 70 mm (2.8 in) spread over 7 days and a higher humidity level of 79%. For more details on how the weather evolves during this transition, check out Bucuresti weather in October.
September generally offers a warm climate, with average temperatures around 20°C (68°F) and maximums reaching up to 36°C (97°F). It tends to be drier, with only about 23 mm (0.9 in) of rainfall spread over just 3 days and average humidity around 57%. In stark contrast, November brings a significant drop in temperatures, averaging just 7°C (45°F) and with minimums dipping to -5°C (24°F). Rainfall increases considerably to 43 mm (1.7 in), with precipitation occurring on 8 days, and humidity rises to 87%. For more detailed information on the weather in November, you can visit Bucuresti weather in November.
September and December present starkly different weather conditions. In September, temperatures range from a mild 1°C (35°F) at night to a warm 36°C (97°F) during the day, with an average of 20°C (68°F). This month experiences relatively low precipitation, totaling 23 mm (0.9 in) over just three days and a comfortable humidity of 57%. In contrast, December sees much colder temperatures, with lows dropping to -9°C (16°F) and a much milder maximum of 15°C (60°F), averaging around 3°C (37°F). Precipitation increases significantly to 63 mm (2.5 in) spread across 11 days, coupled with high humidity at 88%. For more detailed insights into December weather, check out Bucuresti weather in December.
As September unfolds in Bucuresti, it marks a notable transition in weather patterns compared to the sweltering summer months. The city experiences a comfortable average temperature that balances between the highs and lows, offering a reprieve from the intense heat of July and August. With only a few days of rain and moderate humidity, September provides just the right conditions for outdoor activities, making it an inviting time for both locals and visitors. The warmth dwindles as days progress, hinting at the incoming chill of autumn. For those curious about the nuances of Bucuresti’s climate throughout the year, you can explore more at Bucuresti Climate.