September Weather in Baku, Azerbaijan

Last updated: August 21, 2025

In September, Baku, Azerbaijan experiences a pleasant transition to autumn, characterized by an average temperature of 23°C (74°F). With maximum daytime highs reaching up to 30°C (86°F) and cooler evenings settling around 15°C (59°F), it creates an inviting atmosphere for both locals and visitors. The month sees 19 mm (0.7 in) of rainfall spread across just 3 days, allowing plenty of sunshine to shine through. Additionally, the humidity levels linger around a comfortable 73%, contributing to the city's vibrant charm as it welcomes the fall season.

September Temperature in Baku

In September, Baku showcases a delightful transition into autumn, with temperatures reflecting a warm Mediterranean flair. The month begins with an inviting minimum of 15°C (59°F), making it a comfortable time to explore the city. As days progress, the average temperature settles around 23°C (74°F), while highs can reach a pleasant 30°C (86°F). This combination creates ideal conditions for outdoor activities and cultural festivities, as the weather remains mostly warm and sunny. Notably, September marks a gradual cooling trend from the blistering heat of summer, allowing for a more enjoyable experience in this vibrant city by the Caspian Sea.

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

The chart illustrates September temperature patterns in Baku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Baku, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec454446536373798074655549
Data source: Temperature data for Baku generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Baku

In September, Baku experiences a notable shift in precipitation, with 19 mm (0.7 in) of rain falling over three days. This marks a slight increase compared to the preceding summer months, which are characterized by minimal rainfall, averaging just 2 to 4 mm. As autumn approaches, the city's weather begins to show more variability, hinting at the onset of the wetter months ahead. With September's rainfall, Baku signals a transition from the dry heat of summer to the cooler, more moist conditions of fall, setting the stage for the significant rainfall that typically follows in October and November. This gradual buildup of precipitation plays a crucial role in enriching the landscape as the city gears up for the seasonal changes ahead.

September Precipitation Trends in Baku

The chart displays monthly precipitation patterns in Baku, 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. In Baku, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec232229131142319214531
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Baku

In September, Baku experiences a notable shift in humidity, with levels averaging around 73%. This period marks a transition from the summer's drier months—where August dips to 64%—back towards the higher humidity seen in the cooler autumn months. While September is more humid than July and August, it remains comfortably lower compared to the approaching winter months, where humidity surges to peak at 85% in November. This trend showcases Baku's characteristic climate, balancing summer warmth with the impending freshness of fall.

September Average Humidity in Baku

This chart illustrates the average monthly humidity levels in Baku, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Baku is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%83%83%76%77%79%71%64%73%84%85%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Baku

As September rolls into Baku, Azerbaijan, the UV Index remains impressively high at 8, marking a slight decrease from the peak summer months. This level falls into the very high exposure category, underscoring the need for sun protection as the recommended burn time is just 15 minutes. The transition from the intense summer sun reflects a gradual cooling trend, yet September still calls for vigilance. It's notable that after a summer of consistent 10 UV Index ratings in July and June, the decline to 8 signifies that while the sun is still strong, the days are becoming shorter and milder. As you enjoy the late summer vibes, don’t forget to take precautions and check the full details at Baku UV Index for optimal sun safety this month.

Maximum UV Index Levels in Baku for September

The chart shows the monthly maximum UV Index (UVI) for Baku 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. In September, the maximum UV index in Baku typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34779101098532
Data source: Baku 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 Baku

As summer draws to a close, September in Baku continues to bask in a warm glow, offering an impressive 334 sunshine hours. This marks a slight decline from the sun-soaked days of July and August, but still showcases the city’s remarkable luminosity compared to earlier months. With sunshine hours steadily increasing from 184 in January to a peak in July, the trend hints at a beloved summer that bids farewell with lingering warmth. September's glowing skies provide an ideal backdrop for outdoor pursuits, revealing Baku’s resilience in maintaining brightness even as the days grow shorter. As October approaches, the city stands poised to transition into the cooler months, yet it leaves a lasting impression with the memories of its September sunshine.

Monthly Sunshine Duration in Baku: September Highlighted

The September sunshine duration represents the total number of hours Baku 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.
JanFebMarAprMayJunJulAugSepOctNovDec184h243h304h343h396h400h409h385h334h296h230h208h
Data source: Baku September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Baku During September

As September rolls in, Baku's weather offers a promising 74% chance of sunny days, highlighting a delightful transition from the intense summer heat. The month marks a noticeable dip in sunshine probabilities compared to July and August, which boast sunny chances of 80% and 81% respectively. However, September still stands out as one of the more favorable times of the year, following summer's peak and preceding autumn's cooler embrace. With a steady trend from the beginning of the year—from the chilly depths of January with only 40% sun to a vibrant late summer—September continues to reflect Azerbaijan's charm, making it an ideal time for outdoor exploration and enjoyment before the weather turns.

Percentage of Sunny Days in September in Baku

The chart illustrates the percentage of sunny days in Baku 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 Baku experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec40%32%41%56%68%91%80%82%74%55%53%44%
Data source: Baku September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Baku in September

As summer's warmth begins to wane, September marks a transitional phase in Baku, Azerbaijan, with daylight stretching for a comfortable 12 hours. This reflects a subtle decline from the sun-drenched 15 hours of June and 14 hours in July, as the city gradually approaches autumn. The daylight duration remains generous compared to the winter months, where it dips to just 9 hours in January and November. While September still enjoys a decent amount of sunlight, it signals the beginning of shorter days, creating a beautiful blend of lingering summer vibes with the first whispers of fall.

Average Daylight Hours in Baku for September

The chart illustrates the variation in daylight duration in Baku throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 38m10h 39m11h 57m13h 17m14h 25m15h14h 42m13h 42m12h 25m11h 5m9h 55m9h 19m
Data source: Baku daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Baku

As summer transitions into autumn, September in Baku experiences a refreshing revival in wind speed, averaging 7.1 m/s (16 mph). This noticeable increase marks a shift from the calmer conditions of August, when the winds slowed to 4.4 m/s (10 mph). Throughout the year, Baku's winds typically fluctuate, peaking during the winter months at around 7.4 m/s (16 mph) in January. However, September stands out as a pivotal point, bridging the gentler summer breezes with the more vigorous winds of fall. Such trends highlight Baku's dynamic climate, where the winds seemingly dance with the changing seasons, offering both locals and visitors a vibrant atmospheric experience.

Average September Wind Speed in Baku

The chart displays monthly wind speed patterns in Baku, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.47.06.76.56.15.96.44.47.1 m/s6.86.86.6
Data source: Baku September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Baku Compares to Other Months

Weather in Baku varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Baku, 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 minimum of 15°C (59°F) to a comfortable average of 23°C (74°F), peaking at 30°C (86°F), accompanied by relatively low precipitation of 19 mm (0.7 in) over just three days and a humidity level of 73%. In contrast, January experiences a much chillier climate, with minimum temperatures dropping to 0°C (33°F) and an average of only 7°C (45°F), while the maximum reaches 13°C (55°F). This month sees slightly higher precipitation of 23 mm (0.9 in) spread across five days, with humidity rising to 79%. For more details on January weather, visit Baku weather in January.

September and February present stark contrasts in weather. In September, temperatures range from a mild 15°C (59°F) at night to a warm average of 23°C (74°F) and can peak at 30°C (86°F), with relatively low precipitation of 19 mm (0.7 in) over just three days. The humidity sits at a comfortable 73%. In contrast, February is much colder, with temperatures dropping to a minimum of -2°C (29°F) and averaging only 6°C (44°F), reaching a maximum of 15°C (60°F). This month experiences slightly higher precipitation at 22 mm (0.9 in) spread over six days, accompanied by increased humidity at 83%. For more information on February weather, you can check out Baku weather in February.

September and March exhibit striking differences in weather conditions. In September, temperatures typically range from a minimum of 15°C (59°F) to a maximum of 30°C (86°F), with an average temperature of 23°C (74°F). The month experiences relatively low precipitation at 19 mm (0.7 in) over about 3 days and maintains a moderate humidity level of 73%. In contrast, March sees much cooler weather, with temperatures fluctuating between 2°C (36°F) and 15°C (59°F), and an average of just 8°C (46°F). This month has higher precipitation totaling 29 mm (1.1 in) spread over 6 days, accompanied by increased humidity at 83%. For more details on March weather, visit Baku weather in March.

September and April present quite different weather patterns. In September, temperatures range from a comfortable 15°C (59°F) at night to a warm 30°C (86°F) during the day, with an average of 23°C (74°F). The month sees relatively low precipitation at 19 mm (0.7 in) over three days, and humidity levels are at 73%. In contrast, April experiences cooler temperatures, with a minimum of 5°C (42°F) and a maximum of 19°C (66°F), averaging just 12°C (53°F). This month receives slightly less rainfall at 13 mm (0.5 in) across four days, while humidity is slightly higher at 76%. For a deeper dive into April's weather specifics, you can check Baku weather in April.

September generally presents warmer weather compared to May, with average temperatures reaching around 23°C (74°F), peaking at 30°C (86°F) and a minimum of 15°C (59°F). In contrast, May's temperatures are milder, averaging 17°C (63°F), with highs of 25°C (77°F) and lows of 10°C (51°F). While September experiences slightly more precipitation at 19 mm (0.7 in) over three days, May sees less rainfall at 11 mm (0.4 in) across two days. Additionally, both months have relatively high humidity, with September at 73% and May slightly higher at 77%. For a closer look at the weather specifics of May, check out Baku weather in May.

In September, the weather features a comfortable range of temperatures with a minimum of 15°C (59°F), an average of 23°C (74°F), and a maximum of 30°C (86°F). This month experiences a bit more precipitation, with 19 mm (0.7 in) falling over three days and a humidity level of 73%. In contrast, June offers slightly warmer conditions, starting with a minimum of 16°C (61°F) and peaking at 31°C (88°F), yet it remains dry with only 4 mm (0.2 in) of precipitation and no rainy days. The humidity in June is slightly higher at 79%. Overall, while both months share a similar average temperature, September can be expected to be wetter and a touch cooler than June. For a closer look at June’s weather conditions, check out Baku weather in June.

In comparing the weather of September and July, September features a slightly cooler temperature range, with minimums averaging 15°C (59°F) and maximums reaching 30°C (86°F). In contrast, July enjoys warmer temperatures, with a minimum of 19°C (66°F) and maximums hitting 32°C (91°F). Additionally, September experiences some precipitation, averaging 19 mm (0.7 in) over three days, while July remains dry with only 2 mm (0.1 in) and no rainy days at all. Humidity levels are comparable, with September at 73% and July at 71%. For more details specifically about July, you can check out Baku weather in July.

In comparing the weather conditions of September and August, one can observe notable differences. September experiences cooler temperatures, with a minimum of 15°C (59°F), an average of 23°C (74°F), and a maximum of 30°C (86°F), while August is generally warmer, featuring a minimum of 17°C (62°F), an average of 27°C (80°F), and peaks at 33°C (91°F). Additionally, September sees a slight increase in precipitation, with 19 mm (0.7 in) falling over three days, compared to August's near-complete dryness with only 3 mm (0.1 in) on no rainy days. Humidity levels are also higher in September at 73%, whereas August maintains a more comfortable 64%. For a closer look at August's weather, visit Baku weather in August.

September marks the transition into autumn with relatively warm temperatures, averaging around 23°C (74°F) and peaking at 30°C (86°F), while experiencing moderate humidity at 73%. In contrast, October brings cooler conditions, with average temperatures dropping to 18°C (65°F) and maximums reaching only 25°C (77°F). Although both months have similar precipitation patterns, with rain occurring on three days, October sees a slight increase in rainfall to 21 mm (0.8 in) and a rise in humidity to 84%. For more detailed insight into October weather, you can visit Baku weather in October.

September and November present distinctly different weather patterns. In September, temperatures are relatively warm, ranging from a minimum of 15°C (59°F) to a maximum of 30°C (86°F), with an average of 23°C (74°F). The month experiences minimal rainfall, with only 19 mm (0.7 in) falling over just 3 days, and humidity levels hover around 73%. In contrast, November is significantly cooler; temperatures drop to a minimum of 5°C (41°F) and peak at 20°C (69°F), averaging 13°C (56°F). This month sees increased precipitation, totaling 45 mm (1.8 in) over 9 days, and humidity rises to 85%. For more details on the weather in November, you can check Baku weather in November.

September and December present a stark contrast in weather. September typically enjoys milder temperatures, ranging from a minimum of 15°C (59°F) to a maximum of 30°C (86°F), with an average of 23°C (74°F). The month experiences relatively low precipitation at 19 mm (0.7 in) over just 3 days, along with a humidity level of 73%. In contrast, December brings much cooler conditions, where the temperature drops significantly, with a minimum of 4°C (39°F) and a maximum of 17°C (64°F), leading to an average of only 10°C (50°F). Precipitation is notably higher at 31 mm (1.2 in) over 6 days, accompanied by increased humidity at 80%. For more detailed insights into December's climate, visit Baku weather in December.

Compare Baku's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Baku

As summer transitions to autumn, September in Baku showcases a delightful blend of warmth and comfort, with temperatures typically hovering around 23°C (74°F). Unlike the intense heat of July and August, this month offers a more moderate climate that beckons both locals and tourists to explore the city. The pleasant evenings, accompanied by relatively low humidity and only a few days of rain, create an inviting atmosphere. This gradual shift not only enhances outdoor activities but also serves as a perfect time for cultural experiences. For a deeper dive into the weather patterns throughout the year, visit Baku Climate.