September weather forecast
Dhaka, Bangladesh

The weather in September brings Dhaka's summer to a close, and it is the month that ushers in the Autumn season. The city continues to be humid but at slightly lower levels as compared to August. Dhaka receives a significant amount of rainfall in the month, averaging at 86mm (3.39"). Wind speeds exhibit a down trend, with wind speeds ranging from 9.8km/h (6.1mph) to 14.4km/h (8.9mph) on gusty days. Despite a slight drop in temperatures from those in August, September's lowest temperature of 25.7°C (78.3°F) added to humidity results in a high heat index.

Temperature

September in Dhaka is marked by an average high-temperature of a still hot 32.4°C (90.3°F), almost identical to the preceding month. September sees the temperature falling to a mean low of 25.7°C (78.3°F).

Heat index

Throughout September, the heat index is appraised at a blazing hot 46°C (114.8°F). Vigilance: Heat cramps and heat exhaustion are likely. The likelihood of heatstroke increases with continued activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In September, the average relative humidity in Dhaka is 80%.

Rainfall

In Dhaka, Bangladesh, in September, during 20.5 rainfall days, 86mm (3.39") of precipitation is typically accumulated. Throughout the year, in Dhaka, there are 152.3 rainfall days, and 741mm (29.17") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 17min.
On the first day of September, sunrise is at 5:40 am and sunset at 6:16 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 5:46 pm +06.

Sunshine

The average sunshine in September is 8.2h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In September, a regular UV index of 7 translates into these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.