September weather forecast
Khulna, Bangladesh

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Weather in September

September observes a change in trend as monsoon starts to retreat, and autumn begins to spread its wings. A notable decrease in rainfall from 209mm (8.23") in August to 145mm (5.71") in September signals the end of the monsoon season. Despite the reduced rainfall, humidity remains high, often creating a sticky atmosphere. Daylight hours increase, anticipating the clearer days that follow. The departure of monsoon allows the city to slowly return to its beautiful and dry days, setting the stage for the forthcoming festive season.

Temperature

The transition into September in Khulna is marked with an average high-temperature of a still tropical 31.9°C (89.4°F), showing an insignificant shift from August's 32.4°C (90.3°F). Khulna anticipates an average minimum temperature of 26.3°C (79.3°F) in the month of September.

Heat index

The heat index for September is estimated at a scorching 44°C (111.2°F). Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The months with the highest humidity in Khulna are July through September, with an average relative humidity of 80%.

Rainfall

In Khulna, in September, during 26.4 rainfall days, 145mm (5.71") of precipitation is typically accumulated. In Khulna, Bangladesh, during the entire year, the rain falls for 183.1 days and collects up to 1141mm (44.92") of precipitation.

Daylight

The average length of the day in September in Khulna is 12h and 17min.
On the first day of September in Khulna, sunrise is at 5:44 am and sunset at 6:19 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 5:50 pm +06.

Sunshine

In September, the average sunshine is 8.4h.

UV index

March through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Stay sun-safe with clothing that is both closely woven and worn loosely.

Frequently asked questions

How hot is September in Khulna?

In Khulna, 31.9°C (89.4°F) is the average high-temperature and 26.3°C (79.3°F) is the average low-temperature during September. In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is estimated at 44°C (111.2°F).

What is the most humid month in Khulna?

July through September, with an average relative humidity of 80%, are most humid months in Khulna, Bangladesh.

What is the average humidity in September in Khulna?

The average relative humidity in September is 80%.

How many days does it rain in September in Khulna?

In Khulna, during September, the rain falls for 26.4 days and regularly aggregates up to 145mm (5.71") of precipitation.

How many hours of daylight does Khulna have in September?

In September, the average day length in Khulna, Bangladesh, is 12h and 17min.

When are sunrise and sunset in September in Khulna?

On the first day of September in Khulna, sunrise is at 5:44 am and sunset at 6:19 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 5:50 pm +06.

How long on average sun shines in September in Khulna?

In September, the average sunshine duration in Khulna, Bangladesh, is 8.4h.

What is the month with the highest UV index in Khulna?

March through September, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in September in Khulna?

The average daily maximum UV index in September in Khulna, Bangladesh, is 7. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Average temperature in September
Khulna, Bangladesh

Average temperature in September - Khulna, Bangladesh
  • Average high temperature in September: 31.9°C

The warmest month (with the highest average high temperature) is April (36.2°C).
The month with the lowest average high temperature is December (26.5°C).

  • Average low temperature in September: 26.3°C

The month with the highest average low temperature is June (28°C).
The coldest month (with the lowest average low temperature) is January (15.5°C).

Average pressure in September
Khulna, Bangladesh

Average pressure in September - Khulna, Bangladesh
  • Average pressure in September: 1005mbar

The month with the highest atmospheric pressure is January (1014.7mbar).
The month with the lowest atmospheric pressure is July (1000.4mbar).

Average wind speed in September
Khulna, Bangladesh

Average wind speed in September - Khulna, Bangladesh
  • Average wind speed in September: 10.2km/h

The windiest months (with the highest average wind speed) are June and July (14km/h).
The calmest month (with the lowest average wind speed) is November (7.2km/h).

Average humidity in September
Khulna, Bangladesh

Average humidity in September - Khulna, Bangladesh
  • Average humidity in September: 80%

The months with the highest relative humidity are July, August and September (80%).
The month with the lowest relative humidity is February (47%).

Average rainfall in September
Khulna, Bangladesh

Average rainfall in September - Khulna, Bangladesh
  • Average rainfall in September: 145mm

The wettest month (with the highest rainfall) is July (240mm).
The driest month (with the least rainfall) is January (5mm).

Average rainfall days in September
Khulna, Bangladesh

Average rainfall days in September - Khulna, Bangladesh
  • Average rainfall days in September: 26.4 days

The month with the highest number of rainy days is July (29.2 days).
The month with the least rainy days is January (1.3 days).

Average daylight in September /
Average sunshine in September
Khulna, Bangladesh

Average daylight in September / Average sunshine in September - Khulna, Bangladesh
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is April (Average sunshine: 10h and 42min).
The month with the least sunshine is July (Average sunshine: 7h and 12min).

Average sunshine days in September
Khulna, Bangladesh

Average sunshine days in September - Khulna, Bangladesh
  • Average sunshine days in September: 2.5 days

The month with the most sunshine days is January (29.1 days).
The month with the least sunshine days is July (1.2 days).

Average UV index in September
Khulna, Bangladesh

Average UV index in September - Khulna, Bangladesh
  • Average UV index in September: 7

The months with the highest UV index are March, April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, October, November and December (UV index 6).

Average cloud cover in September
Khulna, Bangladesh

Average cloud cover in September - Khulna, Bangladesh
  • Average cloud cover in September: 43

The month with the most cloud cover is July (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 6).

Average visibility in September
Khulna, Bangladesh

Average visibility in September - Khulna, Bangladesh
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, April, May, November and December (10km).
The months with the lowest visibility are June, July, August, September and October (9km).

Khulna, Bangladesh

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