September weather forecastCornillon, Haiti

Weather in September

Temperatures in September relent slightly, with the maximum dropping to 29.8°C (85.6°F), marking a change from the scorching summer days of Cornillon. However, September brings the second highest rainfall of the year, up to 135mm (5.31"), signaling the onset of a wet season. A decrease in daylight hours and a rise in cloud percentage hint at the gradual transition into the cooler part of the year. Despite the heavier rains, there are still ample opportunities to enjoy the city's warm climate. October promises a significant decrease in rainfall back to moderate levels and slight cooling.

Temperature

As Cornillon welcomes September, the average high-temperature stabilizes at a warm 29.8°C (85.6°F), showing little deviation from August's 30.9°C (87.6°F). Throughout September, Cornillon's nights cool down to an average of 21.3°C (70.3°F).

Heat index

For September, the heat index is calculated to be a fiery hot 36°C (96.8°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Cornillon, the average relative humidity in September is 77%.

Rainfall

In Cornillon, in September, it is raining for 22.4 days, with typically 135mm (5.31") of accumulated precipitation. In Cornillon, during the entire year, the rain falls for 227.4 days and collects up to 904mm (35.59") of precipitation.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of the month, sunrise is at 06:33 and sunset at 19:01. On the last day of September, sunrise is at 06:38 and sunset at 18:36 EDT.

Sunshine

The average sunshine in September is 9.6h.

UV index

The months with the lowest UV index in Cornillon are January through May, July through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.