September weather forecastMandeville, Jamaica

Weather in September

In September, Mandeville experiences its highest rainfall of 190mm (7.48"). Weather conditions promise a unique blend of warm temperatures with increased rainfall. Along with high precipitation, clouds cover 40% of the sky on average. The transition from September to October highlights a slight decrease in rain and temperature.

Temperature

As Mandeville steps into September, the average high-temperature holds at a moderately hot 29.3°C (84.7°F), hinting at a minor fluctuation from the prior month. Mandeville experiences an average low-temperature reading of 21.8°C (71.2°F) throughout September.

Heat index

For September, the heat index is calculated to be a very hot 37°C (98.6°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The average relative humidity in September is 85%.

Rainfall

In September, the rain falls for 27.3 days. Throughout September, 190mm (7.48") of precipitation is accumulated. Throughout the year, there are 297.9 rainfall days, and 1472mm (57.95") of precipitation is accumulated.

Daylight

In September, the average length of the day in Mandeville is 12h and 14min.
On the first day of September, sunrise is at 05:55 and sunset at 18:23. On the last day of the month, sunrise is at 06:00 and sunset at 17:59 EST.

Sunshine

In September, the average sunshine is 9.8h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 6 suggests this advice:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Boost your sun resistance with garments that are densely woven yet spacious.