September weather forecast
Praslin, Saint Lucia

Signalling the transition towards the end of the rainy season, September experiences a reduction in rainfall to 64mm (2.52") in Praslin, Saint Lucia. Winds slowing to 18.6km/h (11.6mph) reflect less turbulent atmospheric conditions. The reduction in daylight hours, coupled with a slight decrease in cloud cover, signals the incoming conclusion of the summer period. Despite the receding hours of sunshine, UV protection remains crucial due to the constant UV index.

Temperature

Praslin witnesses its peak temperatures during September and October, when the average high-temperature reaches 29.5°C (85.1°F).

Heat index

The heat index in September is calculated to be a sweltering 35°C (95°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. 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 especially vital to children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Praslin, during September, the rain falls for 19.5 days and regularly aggregates up to 64mm (2.52") of precipitation. Throughout the year, there are 232.4 rainfall days, and 542mm (21.34") of precipitation is accumulated.

Daylight

In Praslin, the average length of the day in September is 12h and 12min.
On the first day of the month, sunrise is at 05:52 and sunset at 18:14. On the last day of September, sunrise is at 05:53 and sunset at 17:53 AST.

Sunshine

The average sunshine in September is 10.1h.

UV index

The months with the highest UV index in Praslin are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Praslin. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.