September weather forecast
Comilla, Bangladesh

September in Comilla marks the retreat of monsoon. There's a steady decline in rainfall and cloud cover, yet the rainfall remains at a substantial level of 134mm (5.28"). The heat starts diminishing, with temperatures beginning their descent, and humidity also sees a small reduction. Though the winds slow down a bit, they still provide a refreshing respite from any residual heat. The month ends the rainy season and welcomes the autumn's advent.

Temperature

Comilla, Bangladesh, registers an average high-temperature of a still hot 31.5°C (88.7°F) at the commencement of September, closely related to the preceding month. Throughout September, an average nighttime temperature of 25.1°C (77.2°F) is experienced in Comilla.

Heat index

September's heat index is estimated at a blisteringly hot 44°C (111.2°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The months with the highest humidity are July through September, with an average relative humidity of 84%.

Rainfall

In Comilla, during September, the rain falls for 25 days and regularly aggregates up to 134mm (5.28") of precipitation. Throughout the year, there are 181.3 rainfall days, and 1106mm (43.54") of precipitation is accumulated.

Daylight

In Comilla, Bangladesh, the average length of the day in September is 12h and 17min.
On the first day of the month, sunrise is at 5:37 am and sunset at 6:13 pm. On the last day of September, in Comilla, sunrise is at 5:46 am and sunset at 5:43 pm +06.

Sunshine

The average sunshine in September is 7.8h.

UV index

March through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.