Cox's Bazar
Bangladesh
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Cox's Bazar, Bangladesh

The first month of the autumn, September, is still a tropical month in Cox's Bazar, Bangladesh, with average temperature ranging between min 25°C (77°F) and max 30.9°C (87.6°F).

Temperature

In Cox's Bazar, the average high-temperature is relatively the same as in August - a still tropical 30.9°C (87.6°F). The average low-temperature, in Cox's Bazar, is 25°C (77°F).

Heat index

The average heat index is calculated to a blistering 42.7°C (108.9°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, wind, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in Cox's Bazar is 86%.

Rainfall

In September, the rain falls for 14 days. Throughout September, 330.1mm (13") of precipitation is accumulated. In Cox's Bazar, Bangladesh, during the entire year, the rain falls for 113 days and collects up to 3524.1mm (138.7") of precipitation.

Sea temperature

In Cox's Bazar, Bangladesh, the average water temperature is 29.2°C (84.6°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in September is 12.3h.

Sunshine

In Cox's Bazar, the average sunshine is 4h.

UV index

April through September, with an average maximum UV index of 12, are months with the highest UV index in Cox's Bazar. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 12 interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Cox's Bazar?

In Cox's Bazar, in September, the average high-temperature is 30.9°C (87.6°F), and the average low-temperature is 25°C (77°F). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines relative humidity and air temperature, is evaluated at 42.7°C (108.9°F).

What is the average humidity in September in Cox's Bazar?

The average relative humidity in September in Cox's Bazar, Bangladesh, is 86%.

How many days does it rain in September in Cox's Bazar?

In September, in Cox's Bazar, Bangladesh, the rain falls for 14 days. Throughout September, 330.1mm (13") of precipitation is accumulated.

How warm is the water in September in Cox's Bazar?

In September, the average sea temperature in Cox's Bazar is 29.2°C (84.6°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Cox's Bazar?

The average length of the day in September is 12.3h.

How long on average sun shines in September in Cox's Bazar?

In September, the average sunshine in Cox's Bazar, Bangladesh, is 4h.

When is the highest UV index in Cox's Bazar?

Months with the highest UV index in Cox's Bazar, Bangladesh, are April through September, with an average maximum UV index of 12.

What is the UV index intensity in September in Cox's Bazar?

In September, the average daily maximum UV index in Cox's Bazar, Bangladesh, is 12. A UV Index value of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Cox
  • Average high temperature in September: 30.9°C

The warmest month (with the highest average high temperature) is May (32.3°C).
The month with the lowest average high temperature is January (26.7°C).

  • Average low temperature in September: 25°C

The month with the highest average low temperature is June (25.2°C).
The coldest month (with the lowest average low temperature) is January (15°C).

Average humidity in September - Cox
  • Average humidity in September: 86%

The month with the highest relative humidity is July (89%).
The month with the lowest relative humidity is February (71%).

Average rainfall in September - Cox
  • Average rainfall in September: 330.1mm

The wettest month (with the highest rainfall) is July (924.6mm).
The driest month (with the lowest rainfall) is January (4.1mm).

Average rainfall days in September - Cox
  • Average rainfall days in September: 14 days

The month with the highest number of rainy days is July (22 days).
Months with the lowest number of rainy days are January and December (1 days).

Average sea temperature in September - Cox
  • Average sea temperature in September: 29.2°C

The best month for swimming (with the highest average sea temperature) is June (29.8°C).
The coldest month (with the lowest average sea temperature) is January (23.8°C).

Average daylight in September / Average sunshine in September - Cox
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.8h).

  • Average sunshine in September: 4h

Months with most sunshine are January and February (Average sunshine: 9h).
Months with least sunshine are June, July and August (Average sunshine: 3).

Average UV index in September - Cox
  • Average UV index in September: 12

Months with the highest UV index are April, May, June, July, August and September (UV index 12).
Months with the lowest UV index are January and December (UV index 7).