September Weather in Barishal, Bangladesh

Last updated: August 21, 2025

September in Barishal, Bangladesh is characterized by a warm climate, with maximum temperatures reaching 36°C (96°F) and an average of 29°C (84°F), providing a sultry backdrop for the bustling city. The month is marked by significant rainfall, with a total precipitation of 253 mm (9.9 in) over approximately 25 rainy days, resulting in an average humidity level of 82%. This blend of warmth and moisture creates a lush environment, typical of the monsoon season, making September both a vibrant and challenging time for locals.

September Temperature in Barishal

As September arrives in Barishal, Bangladesh, the temperatures maintain a warm embrace, with minimums around 25°C (77°F) and maximums peaking at 36°C (96°F). This month reflects the transition from the sweltering summer months, where the heat remains relatively consistent, with an average temperature of 29°C (84°F). Notably, September's warmth aligns closely with the preceding months of August and July, indicating that Barishal's climate remains predominantly tropical, wrapped in humidity and heat. As the region edges closer to autumn, the promise of cooler days ahead begins to emerge, inviting both relief and a gradual shift in the local atmosphere. The lingering warmth, however, still beckons the vibrant life and energy typical of this bustling city.

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

The chart illustrates September temperature patterns in Barishal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Barishal, 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).
JanFebMarAprMayJunJulAugSepOctNovDec657079848584848484827567
Data source: Temperature data for Barishal 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 Barishal

In September, Barishal experiences a significant transition in its precipitation patterns, receiving 253 mm (9.9 inches) of rain over approximately 25 days. This marked reduction from the preceding months of June, July, and August, which see peak rainfall, underscores the gradual tapering of the monsoon season. As September unfolds, the heavy downpours characteristic of summer start to wane, signaling a shift towards the drier months ahead. Still, the substantial rainfall during this time contributes to the region's lush greenery, while the lingering humidity maintains a warm atmosphere, making it a unique time in Barishal's climatic calendar.

September Precipitation Trends in Barishal

The chart displays monthly precipitation patterns in Barishal, 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 Barishal, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec56331181754053532832531876536
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Barishal

In September, Barishal experiences a notable spike in humidity, reaching 82%, the highest level of the year. This month marks a transition from the relatively drier summer, where humidity peaks at 81% in July, gradually climbing from 45% in April. The rising moisture in the air signals the onset of the monsoon season, which typically wraps up by this time. Following September, the humidity dips slightly in October, falling to 78%, but remains elevated compared to the earlier months of the year. This trend underscores the region's tropical climate, characterized by a significant increase in humidity as the year progresses, peaking just before the onset of the cooler months.

September Average Humidity in Barishal

This chart illustrates the average monthly humidity levels in Barishal, 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 Barishal is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec57%50%41%45%69%72%81%78%83%78%68%64%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Barishal

In September, Barishal, Bangladesh experiences a UV Index of 13, categorizing it as extreme and necessitating a burn time of just 10 minutes. This marks a slight decrease from the peak UV Index of 14 recorded in August, yet the intensity remains significant, showcasing the region's continued exposure to harmful solar radiation as the monsoon season winds down. The trend of high to extreme UV levels throughout the summer months underscores the importance of sun protection during this time. As residents and visitors navigate the shifting weather patterns, awareness of the UV index is crucial for safe outdoor activities. For more details, visit the Barishal UV Index.

Maximum UV Index Levels in Barishal for September

The chart shows the monthly maximum UV Index (UVI) for Barishal 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 Barishal typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6791013131314131176
Data source: Barishal 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 Barishal

In September, Barishal experiences a delightful 276 hours of sunshine, showcasing a transition into the vibrant autumn months. This slight dip from the summer peak of 333 hours in May reflects the city's gradual shift as it moves away from the sweltering heat. Interestingly, September’s sunshine hours remain significantly higher than the winter months to come, hinting at the lingering warmth and light that stretch into early fall. As the city enjoys a balanced blend of sun and more temperate weather, September serves as a reminder of summer's glow while paving the way for the cozy charm of the upcoming season.

Monthly Sunshine Duration in Barishal: September Highlighted

The September sunshine duration represents the total number of hours Barishal 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.
JanFebMarAprMayJunJulAugSepOctNovDec243h285h327h326h333h263h273h286h276h294h286h281h
Data source: Barishal September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Barishal During September

In Barishal, Bangladesh, September marks a significant downturn in sunny weather, with only 11% chance of sun, one of the lowest rates of the year. This follows a steady decline from the sunny days of earlier months, particularly January and February, which boast an impressive 84% chance of clear skies. As the monsoon season peaks in the summer months, the likelihood of sunshine drastically diminishes, plummeting to a mere 5% in July and 7% in August. After the wet and cloudy September, the weather begins to improve slightly in October, creeping back up to 48%, signaling the gradual return of brighter days ahead. Overall, September serves as a stark reminder of the monsoon's grip on Barishal, making sunny weather a rare and cherished occurrence.

Percentage of Sunny Days in September in Barishal

The chart illustrates the percentage of sunny days in Barishal 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 Barishal experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%73%72%54%12%5%7%11%48%73%64%
Data source: Barishal September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Barishal in September

As September arrives in Barishal, Bangladesh, the day length begins to shift, providing a comfortable 12 hours of daylight. This duration reflects a gradual decline from the lush, sun-drenched days of summer, where June to August bask in 13 hours of light, creating a vibrant environment perfect for outdoor activities. As autumn unfolds, daylight gradually shortens, signaling the transition towards shorter days in October and November. Interestingly, the daylight hours in September remain steady, echoing the equal distribution seen in the peak of spring and summer, suggesting a delightful balance before the retreat into the cooler, dimmer months of the year.

Average Daylight Hours in Barishal for September

The chart illustrates the variation in daylight duration in Barishal throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 53m11h 23m12h 1m12h 40m13h 13m13h 29m13h 21m12h 52m12h 14m11h 36m11h 2m10h 45m
Data source: Barishal daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Barishal

As September unfolds in Barishal, Bangladesh, the average wind speed gently settles at 2.5 m/s (6 mph), marking a subtle shift from the breezier months of June and July, both boasting speeds of 3.2 m/s (7 mph). The wind begins to taper from the summer's peak, creating a pleasant balance as the region transitions into the cooler autumn days. This month reflects a notable decline from the early summer's gusts yet retains a refreshing quality, reminiscent of the lush greenery that characterizes the landscape. As the seasons change, the winds of September invite a gentle reminder of the impending dip towards the calmer, cooler months ahead.

Average September Wind Speed in Barishal

The chart displays monthly wind speed patterns in Barishal, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.12.22.32.52.83.23.22.82.5 m/s1.81.92.1
Data source: Barishal September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Barishal Compares to Other Months

Weather in Barishal varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Barishal, focusing on differences in temperature, rainfall, humidity, and UV levels.

The weather in September and January presents a striking contrast. September experiences warm to hot temperatures, with minimums around 25°C (77°F) and maximums reaching up to 36°C (96°F), accompanied by high humidity at 82% and significant rainfall of 253 mm (9.9 in) over 25 days. In contrast, January offers a much cooler atmosphere, with minimum temperatures dipping to 9°C (49°F) and maximums around 30°C (86°F), while enjoying remarkably low precipitation of just 5 mm (0.2 in) and clear skies with no rainy days. The humidity also decreases to 57%, making January a far drier and more comfortable month. For more details on January weather, you can check Barishal weather in January.

September and February exhibit striking differences in weather patterns. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 36°C (96°F), with an average of 29°C (84°F). The month experiences considerable rainfall, accumulating 253 mm (9.9 in) over 25 days, contributing to high humidity levels of 82%. In contrast, February presents a cooler climate, with temperatures ranging from a low of 10°C (49°F) to a high of 34°C (93°F) and an average of 21°C (71°F). This month sees minimal precipitation of just 6 mm (0.2 in) over a single day, resulting in lower humidity at 50%. For more details on February weather, visit Barishal weather in February.

September and March present a stark contrast in weather patterns. In September, temperatures range from a minimum of 25°C (77°F) to a sweltering maximum of 36°C (96°F), with an average of 29°C (84°F). This month is marked by high humidity at 82% and significant rainfall, totaling 253 mm (9.9 in) over 25 days. In sharp contrast, March features a cooler climate with minimum temperatures dropping to 15°C (59°F) and an average of 26°C (79°F), while still reaching up to 36°C (98°F) on hot days. Precipitation in March is minimal, with only 33 mm (1.3 in) occurring over just 4 days and a much lower humidity level of 41%. For more details about the weather in March, you can visit Barishal weather in March.

When comparing the weather in September and April, several notable differences emerge. September typically experiences warmer temperatures, ranging from a minimum of 25°C (77°F) to a maximum of 36°C (96°F), with an average of 29°C (84°F). In contrast, April has a slightly lower minimum temperature of 20°C (68°F) but can reach a higher maximum of 38°C (101°F), maintaining the same average of 29°C (84°F). Precipitation levels are significantly higher in September, with 253 mm (9.9 in) of rainfall across 25 days, compared to April’s 118 mm (4.6 in) over just 12 days. Furthermore, the humidity in September is noticeably higher at 82%, while April enjoys a more comfortable humidity level of 45%. For more details, check out Barishal weather in April.

In September, the weather is characterized by higher humidity at 82%, with average temperatures hovering around 29°C (84°F) and reaching a maximum of 36°C (96°F). The month also experiences significant rainfall, totaling 253 mm (9.9 in) over approximately 25 days. In contrast, May presents slightly cooler temperatures, with a minimum of 22°C (72°F) and an average of 29°C (85°F), peaking at 38°C (100°F). However, May has less rainfall, with 175 mm (6.9 in) over 15 days and a more comfortable humidity level of 69%. For more detailed information, check out Barishal weather in May.

When comparing the weather in September and June, both months experience similarly high temperatures, with minimums around 25°C (77°F) and maximums reaching up to 36°C (96°F). However, September exhibits higher humidity at 82%, contrasted with June's 72%. Rainfall also differentiates the two; September receives about 253 mm (9.9 in) of precipitation over 25 days, while June is significantly wetter, with 405 mm (15.9 in) over the same number of days. For more specific details about June weather, you can visit Barishal weather in June.

In comparing the weather between July and September, both months exhibit similar temperature patterns, with minimums around 25°C (77-78°F), daily averages of 29°C (84°F), and maximums reaching up to 36°C (96-97°F). However, July tends to be wetter, receiving 352 mm (13.9 in) of precipitation across 29 days, while September sees a decline in both rainfall to 253 mm (9.9 in) over 25 days. Humidity levels remain comparable, with September at 82% and July at 81%. For more detailed weather information, you can check Barishal weather in July.

In comparing the weather between September and August, we see some notable differences. September has a minimum temperature of 25°C (77°F), which is slightly cooler than August's minimum of 26°C (79°F). Both months have similar average temperatures around 29°C (84°F) to 29°C (85°F), but September reaches a higher maximum temperature at 36°C (96°F), compared to August's maximum of 35°C (96°F). However, September experiences more precipitation, with 253 mm (9.9 in) over 25 days, compared to August’s 283 mm (11.1 in) over 30 days. Additionally, September has a higher humidity level at 82%, while August sits at 78%. For a more in-depth look at August weather, you can visit Barishal weather in August.

September and October weather exhibit noticeable differences, particularly in temperature and precipitation. In September, the average temperature peaks at 29°C (84°F) with minimums reaching 25°C (77°F), while October experiences slightly cooler temperatures, with an average of 28°C (83°F) and a minimum of 19°C (67°F). Precipitation also decreases significantly from 253 mm (9.9 in) over 25 days in September to 187 mm (7.4 in) across 14 days in October, indicating a transition to drier conditions. Humidity levels remain relatively high in both months but drop slightly from 82% in September to 78% in October. For more detailed insights, you can check out the Barishal weather in October.

September is characterized by significantly warmer temperatures, with daily averages around 29°C (84°F) and maximums reaching up to 36°C (96°F). The month also experiences high humidity levels at 82% and considerable precipitation, totaling 253 mm (9.9 in) over 25 days. In contrast, November brings a noticeable drop in temperature, with averages around 24°C (75°F) and maximums of 32°C (90°F). The humidity decreases to 68%, and the month is much drier, receiving only 65 mm (2.6 in) of rain over just 3 days. For more insights on the climate during this time, visit Barishal weather in November.

In September, the weather is characterized by high temperatures, with a minimum of 25°C (77°F) and an average of 29°C (84°F), peaking at a sweltering 36°C (96°F). This month is also marked by significant rainfall, with 253 mm (9.9 in) spread over 25 days, and high humidity levels at 82%. In contrast, December brings a considerable change; the temperatures drop significantly, ranging from a minimum of 11°C (52°F) to an average of 20°C (68°F), with a maximum of 30°C (86°F). Rainfall is scarce in December, totaling only 36 mm (1.4 in) over just 2 days, and humidity decreases to 64%. For more details on December weather in Barishal, visit Barishal weather in December.

Compare Barishal's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Barishal

In September, Barishal experiences a unique blend of warmth and humidity, with average temperatures hovering around 29°C. This month stands out due to its significant precipitation, bringing over 250 mm of rain across 25 days, which noticeably influences the region's lush landscape. The high humidity level, reaching 82%, adds to the muggy atmosphere, making it feel warmer than it actually is. Unlike the drier, hotter months that precede it, September ushers in a refreshing but soggy transition towards the cooler season ahead. For more insights into Barishal's weather patterns, visit Barishal Climate.