September Weather in Bari, Italy

Last updated: March 24, 2025

Bari, Italy, experiences a vibrant September where temperatures soar to a maximum of 34°C (94°F), creating warm days perfect for exploring the beautiful coastline. The average temperature hovers around 22°C (72°F), offering a pleasant climate for outdoor activities. However, evenings can be cooler with a minimum temperature dipping to 12°C (54°F). While visitors can enjoy sun-soaked days, the month also sees 51 mm (2.0 in) of rainfall spread across 9 days, contributing to a relative humidity of 66%. This combination of warmth and intermittent rain makes September an ideal time to enjoy the rich culture and stunning landscapes of Bari, while still having the occasional refreshing shower.

September Temperature in Bari

September in Bari, Italy, marks a delightful transition as summer gracefully hands over to autumn. With temperatures ranging from a mild 12°C (54°F) to a warm 34°C (94°F), this month boasts an inviting average of 22°C (72°F), perfect for soaking in the last rays of summer sun. As the sweltering heat of July and August fades, September offers a more comfortable climate, ideal for exploring the picturesque coastal scenery or savoring local cuisine al fresco. This month encapsulates a blend of warmth and pleasant breezes, making it a popular time for both tourists and locals to enjoy the vibrant atmosphere of Bari before the chill of October sets in.

September Weather in Bari: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bari, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec464951576574798072635750
Data source: Temperature data for Bari generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Bari

In Bari, Italy, September marks a transition as summer's heat begins to wane, bringing with it 51 mm (2.0 in) of rainfall over 9 days. This increase in precipitation is a slight uptick from the drier summer months, particularly July and August, which saw just 20 mm (0.8 in) and 31 mm (1.2 in) respectively. As the city moves into the fall, September’s rain is a precursor to the wetter months ahead, leading into October with its expected 62 mm (2.4 in). This trend highlights a notable shift in the climatic patterns, emphasizing the need for residents and visitors alike to prepare for more frequent showers as the seasons change. Overall, September serves as a gentle reminder of nature's rhythms before the arrival of the more robust downpours of autumn.

September Precipitation Trends in Bari

The chart displays monthly precipitation patterns in Bari, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec5457575664382031516210558
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bari

In September, Bari experiences a notable shift in humidity, with levels averaging 66%. This transition marks a return to slightly more moisture in the air after the hot summer months, where humidity dipped to a low of 56% in August. As the city moves from the warmth of summer to the cooler embrace of autumn, September's humidity is a gentle reminder of the changing seasons. This increase is subtle compared to the winter months, where humidity peaks at 82% in January and December. Overall, while September maintains a comfortable balance, it signals the beginning of a gradual rise in humidity as Bari prepares for the wetter months ahead.

September Average Humidity in Bari

This chart illustrates the average monthly humidity levels in Bari, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec82%74%70%71%71%65%61%56%66%74%80%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bari

As summer fades into autumn, September in Bari marks a shift in the UV Index, showcasing a return to high exposure levels with an index of 7. After the intense rays of July and August, which reached a peak of 10, the UV exposure becomes more moderate, yet still requires caution, especially for those staying out longer—around 25 minutes for fair skin to avoid sunburn. This month bridges the gap between the sweltering summer days and the cooler months ahead, making it a perfect time for outdoor activities while remaining vigilant about sun safety. For more details on the UV levels throughout the year, check out the Bari UV Index.

Maximum UV Index Levels in Bari for September

The chart shows the monthly maximum UV Index (UVI) for Bari in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3457991097632
Data source: Bari September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Bari

As September rolls in, Bari, Italy basks in a delightful glow, receiving an impressive 344 hours of sunshine. This marks a gentle tapering from the summer's peak brilliance in July, when the city enjoys a lively 428 hours of sun. The warmth lingers throughout the month, offering a golden farewell to summer while ushering in the softer light of autumn. With days still bright and inviting, September serves as a perfect backdrop for exploring Bari’s historic streets and vibrant coastline, bridging the fullest days of summer with the enchanting beginnings of fall. As the sunshine begins to dwindle into October's 315 hours, the charm of the season transforms, yet the fond memories of September remain illuminated in the heart of this Italian gem.

Monthly Sunshine Duration in Bari: September Highlighted

The September sunshine duration represents the total number of hours Bari experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec197h260h328h358h402h415h428h398h344h315h245h253h
Data source: Bari September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Bari During September

As summer gives way to autumn, September in Bari, Italy, continues to offer a delightful blend of warmth and sunshine. With a 57% chance of sunny weather, it stands as a transitional month where the lingering warmth of summer still graces the region. This probability mirrors that of March and April, suggesting a steady climate that favors pleasant days. September's sunshine is complemented by a gradual decline in temperatures, making it an ideal time for travelers seeking milder weather without sacrificing those sunny beach days. The favorable conditions make September a charming choice for experiencing Bari's coastal beauty before the cooler months set in.

Percentage of Sunny Days in September in Bari

The chart illustrates the percentage of sunny days in Bari throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Bari experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec40%57%57%50%59%67%79%77%57%46%27%52%
Data source: Bari September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Bari in September

As summer gently transitions into fall, September in Bari, Italy, offers a delightful balance with approximately 12 hours of daylight. This month marks a gradual decline from the peak of summer, which boasted 15 hours in June. The daylight duration steadily decreases, following a pattern seen throughout the year, as Bari shifts from the sun-drenched days of May and June towards the shorter light of winter. With the sun dipping from 14 hours in July to 13 hours in August, September serves as a gentle reminder of the changing seasons, inviting residents and visitors to savor the lingering warmth before the daylight shrinks to 11 hours in October.

Average Daylight Hours in Bari for September

The chart illustrates the variation in daylight duration in Bari throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 34m10h 37m11h 57m13h 19m14h 29m15h 4m14h 45m13h 44m12h 25m11h 3m9h 52m9h 15m
Data source: Bari daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Bari

As summer transitions to autumn, the September wind in Bari, Italy gently slows down, with an average speed of 2.7 m/s (6 mph), marking the calmest month of the year. This decrease follows a pattern from the previous months, where July and August also exhibited similar tranquility, averaging around 2.9 m/s (7 mph). The lighter breezes of September create a serene backdrop for the picturesque coastal city, inviting locals and visitors alike to enjoy leisurely strolls along the waterfront. Though the winds pick up slightly in October, reaching about 3.0 m/s (7 mph), September’s soft gusts evoke a sense of stillness, making it an ideal time to bask in Bari's charm as summer fades away.

Average September Wind Speed in Bari

The chart displays monthly wind speed patterns in Bari, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.83.33.63.33.52.93.12.92.7 m/s3.03.44.3
Data source: Bari September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Bari Compares to Other Months

The weather in Bari changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Bari and find detailed weather information for every month.

September weather is characterized by a warm average temperature of 22°C (72°F) and can reach a maximum of 34°C (94°F), making it a comfortable month for outdoor activities. In contrast, January sees a significant drop in temperatures, with averages around 8°C (46°F) and lows plunging to -7°C (20°F), creating a much colder atmosphere. Both months experience similar precipitation levels, with September receiving 51 mm (2.0 in) and January slightly higher at 54 mm (2.1 in), but January's humidity is notably higher at 82%, compared to September's 66%. For a detailed look at January's conditions, you can visit Bari weather in January.

September and February present quite contrasting weather patterns. In September, temperatures range from a mild 12°C (54°F) to a warm 34°C (94°F), making it a month of warmth with an average of 22°C (72°F). The humidity sits at a comfortable 66%, and while there is some precipitation, totaling 51 mm (2.0 in) over 9 days, the overall feel is summery. In stark contrast, February experiences cooler conditions, with temperatures dipping as low as -2°C (29°F) and only reaching a maximum of 21°C (70°F). The average temperature in this month is significantly lower at 9°C (49°F), with a slightly higher precipitation of 57 mm (2.2 in) over the same number of rainy days. The humidity during this time also rises to 74%, adding to the chill in the air. For more specifics on February weather in Bari, check out Bari weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a mild 12°C (54°F) to a warm 34°C (94°F), with an average of 22°C (72°F). The month sees about 51 mm (2.0 in) of precipitation over 9 days and a humidity level of 66%. In contrast, March experiences cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 22°C (72°F), averaging at 11°C (51°F). This month records slightly more precipitation at 57 mm (2.2 in) across 10 days and higher humidity at 70%. For more details on this chilly month, you can check out Bari weather in March.

When comparing the weather in September and April, there are notable differences in temperature and precipitation. September features a warmer climate with average temperatures around 22°C (72°F) and maximums reaching 34°C (94°F), while April enjoys cooler conditions, averaging 14°C (57°F) with maximums of 27°C (81°F). Both months experience similar levels of precipitation, with September receiving 51 mm (2.0 in) and April slightly higher at 56 mm (2.2 in), although both months have rain on about 9 days. Additionally, humidity is higher in April at 71%, compared to 66% in September. For more detailed information, you can check Bari weather in April.

In comparing the weather between September and May, September generally offers warmer temperatures, with an average high of 34°C (94°F) compared to May's average high of 33°C (91°F). However, May starts off cooler with a minimum temperature of 7°C (44°F), whereas September's minimum is slightly higher at 12°C (54°F). Precipitation levels are slightly higher in May, with 64 mm (2.5 in) recorded over 8 days, while September sees 51 mm (2.0 in) over 9 days. Additionally, humidity levels are marginally higher in May at 71%, compared to September's 66%. For more details, you can check Bari weather in May.

When comparing the weather in September and June, notable differences emerge in temperature, precipitation, and humidity. September experiences a wider temperature range, with a minimum of 12°C (54°F) and a maximum of 34°C (94°F), while June has slightly lower minimum temperatures but reaches an impressive maximum of 39°C (103°F). Precipitation in September totals 51 mm (2.0 in) over 9 days, making it wetter than June, which sees 38 mm (1.5 in) across 7 days. Both months have similar humidity levels, around 65-66%. For more detailed insights, you can explore Bari weather in June.

In comparing the weather between September and July, September tends to be milder with average temperatures around 22°C (72°F), while July boasts hotter averages at 26°C (79°F) and can reach maximums up to 40°C (104°F). Humidity levels are slightly higher in September at 66%, compared to 61% in July, contributing to a more uncomfortable feel during the hottest months. While July experiences less precipitation, with only about 20 mm (0.8 in) over 4 days, September sees a noticeable increase in rainfall, totaling 51 mm (2.0 in) over 9 days. For more specific information on July weather, you can check this link: Bari weather in July.

In comparing the weather between August and September, we see a noticeable shift in temperatures and humidity levels. August tends to be hotter, with minimum temperatures around 17°C (62°F) and averaging 26°C (80°F), peaking at a sweltering 41°C (106°F). In contrast, September offers a slightly cooler climate, with minimum temperatures dropping to 12°C (54°F) and an average of 22°C (72°F), reaching a maximum of 34°C (94°F). Precipitation also varies, as September experiences 51 mm (2.0 in) of rain over 9 days, compared to August's 31 mm (1.2 in) over just 7 days. Additionally, the humidity is higher in September at 66%, compared to August's 56%. For more detailed information, you can check Bari weather in August.

September features warmer temperatures with a minimum of 12°C (54°F) and an average high of 34°C (94°F), making it a month that still carries the warmth of summer. In contrast, October cools down significantly, with temperatures dropping to a minimum of 8°C (46°F) and an average maximum of 28°C (83°F). While September experiences 51 mm (2.0 in) of precipitation over 9 days, October sees a slight increase in rainfall, totaling 62 mm (2.4 in) with the same number of rainy days. Humidity also rises slightly from 66% in September to 74% in October, contributing to the feeling of crispness in the air. For a detailed look at what to expect, visit Bari weather in October.

September and November showcase a striking contrast in weather patterns. In September, temperatures range from a mild 12°C (54°F) to a warm 34°C (94°F), with an average of 22°C (72°F). The month typically experiences 51 mm of precipitation over about 9 days, accompanied by a humidity level of 66%. In sharp contrast, November sees much cooler temperatures, with a minimum of 3°C (38°F), an average of 14°C (57°F), and a maximum of 24°C (75°F). Precipitation increases to 105 mm over 11 days, along with higher humidity at 80%. For a more detailed look at what to expect, check out Bari weather in November.

September and December showcase a stark contrast in weather patterns. In September, temperatures are much warmer, with daily averages around 22°C (72°F) and peaks reaching up to 34°C (94°F), along with 51 mm of precipitation spread over about 9 days. Conversely, December brings cooler conditions, with an average temperature of just 10°C (50°F) and maximums around 18°C (64°F), accompanied by a slight increase in rainfall to 58 mm over approximately 11 days. The humidity also rises in December to 82%, compared to September's 66%, adding to the overall chill of the winter month. For more detailed insights, check out Bari weather in December.

Compare Bari's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Bari

As summer transitions to autumn, September in Bari offers a delightful blend of warmth and refreshing breezes. With daytime temperatures still reaching around 34°C (94°F), the city retains a summer vibe, yet evenings cool down significantly, providing a pleasant respite. The average temperature hovers around 22°C (72°F), making it ideal for exploring the picturesque coastline and vibrant streets. However, this month also introduces a touch of autumn humidity, averaging 66%, and occasional rain, with 51 mm falling over about 9 days. This unique combination sets September apart from the hotter months of July and August, inviting visitors to enjoy outdoor activities without the extreme heat. For a detailed look at what to expect, check out the Bari Climate.