September weather forecast
Vieux Fort, Saint Lucia

September is the hottest month in Vieux Fort, with temperatures climbing to 29.5°C (85.1°F). Likewise, historically, Saint Lucia residents face significant showers of about 64mm (2.52"). Simultaneously, the sea temperatures start to decrease but remain warm for swimming and other water activities. Meanwhile, daylight hours become shorter, signaling the end of the longer summer days. Despite the rain, Vieux Fort remains a beautiful tropical paradise, brands summer's end with a mix of warmth, sun, and refreshing rain.

Temperature

September and October are the warmest months, with an average high-temperature of 29.5°C (85.1°F).

Heat index

The heat index in September is computed to be a torrid 35°C (95°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', comes about by integrating the temperature readings with the humidity levels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in September is 75%.

Rainfall

In September, in Vieux Fort, the rain falls for 19.5 days. Throughout September, 64mm (2.52") of precipitation is accumulated. In Vieux Fort, during the entire year, the rain falls for 232.4 days and collects up to 542mm (21.34") of precipitation.

Sea temperature

With an average sea temperature of 29.6°C (85.3°F), September is the month with the warmest seawater in Vieux Fort, Saint Lucia.
Note: Water activities in surface temperatures between 25°C (77°F) and 29°C (84.2°F) are seen as exceptional and extremely agreeable for lengthened time spans.

Daylight

The average length of the day in September in Vieux Fort 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, in Vieux Fort, 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 Vieux Fort are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 during September translates into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Note! Reflective surfaces like sand and water heighten the UV radiation levels.