September weather forecast
Bangladesh

September signifies the gradual withdrawal of the monsoon season in Bangladesh. While the country still experiences heavy rainfall, there is a significant reduction compared to the peak monsoon months of July and August. Average daytime temperatures generally range from 29°C (84.2°F) to 33°C (91.4°F), with nighttime temperatures around 26°C (78.8°F). As usual, cooler nights may be expected in the northern regions like Rajshahi and Rangpur.

In the major cities of Dhaka and Chittagong, similar temperature patterns are observed. Dhaka sees temperatures ranging from 26°C (78.8°F) to 33°C (91.4°F), while in Chittagong, the influence of the Bay of Bengal results in temperatures between 25°C (77°F) and 32°C (89.6°F).

September experiences a decline in average rainfall to 300mm (11.81"), half of what is seen in the peak monsoon months. However, the high humidity levels persist, making the weather feel warmer than the actual temperatures suggest. Occasional thunderstorms are also common during this month.

The reduction in rainfall and the continuation of lush green landscapes make September a potentially more attractive time to visit Bangladesh than the preceding monsoon months. However, visitors must still be prepared for some heavy rainfall. Looking forward, the weather continues to improve with the onset of October, which sees a further decline in rainfall and marks the transition to autumn.

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• Dhaka - September »
  In Dhaka in September, during 20.5 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Dhaka during September, the rain falls for 20.5 days and regularly aggregates up to 86mm (3.39") of precipitation.
• Chittagong - September »
  In Chittagong in September, the average water temperature is 29.1°C (84.4°F). In Chittagong in September, it is raining for 27.8 days, with typically 201mm (7.91") of accumulated precipitation.
• Khulna - September »
  July through September, with an average relative humidity of 80%, are most humid months in Khulna, Bangladesh. The months with the highest humidity in Khulna are July through September, with an average relative humidity of 80%.
• Sylhet - September »
  On the first day of September in Sylhet sunrise is at 5:33 am and sunset at 6:11 pm. In Sylhet in September, it is raining for 28.5 days, with typically 254mm (10") of accumulated precipitation.
• Rajshahi - September »
  In Rajshahi, in September, it is raining for 11 days, with typically 234mm (9.21") of accumulated precipitation. Rajshahi's weather in September displays an average high-temperature of a still hot 32.3°C (90.1°F), showing minor disparity from August's 32°C (89.6°F).
• Barisal - September »
  In Barisal, during September, the rain falls for 22.2 days and regularly aggregates up to 61mm (2.4") of precipitation. On the last day of September, in Barisal, sunrise is at 5:49 am and sunset at 5:47 pm +06.
• Comilla - September »
  March through September, with an average maximum UV index of 7, are months with the highest UV index in Comilla, Bangladesh. The average heat index, which factors the actual air temperature with the relative humidity, in September is estimated at 44°C (111.2°F).
• Mymensingh - September »
  In September, the average heat index, which combines relative humidity and air temperature, is evaluated at 38°C (100.4°F). On the first day of September in Mymensingh, sunrise is at 5:39 am and sunset at 6:17 pm.
• Cox's Bazar - September »
  In Cox's Bazar in September, the average water temperature is 29.2°C (84.6°F). In Cox's Bazar, in September, the average water temperature is 29.2°C (84.6°F).
• Jessore - September »
  A decline in average rainfall, humidity and relative wind speeds characterizes the weather in Jessore during September. On the first day of September in Jessore, Bangladesh, sunrise is at 5:45 am and sunset at 6:20 pm.