September weather forecast
Vieux Fort, Saint Lucia

September is the hottest month in Vieux Fort, with temperatures climbing to 29.5°C. Likewise, historically, Saint Lucia residents face significant showers of about 64mm. 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

Vieux Fort's temperature peaks during September and October, with an average high-temperature of 29.5°C.

Heat index

Throughout September, the heat index is calculated to be a fiery hot 35°C. Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Heat index values are typically calculated for conditions of shade and a light breeze. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful 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.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. 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 September, the rain falls for 19.5 days. Throughout September, 64mm of precipitation is accumulated. Throughout the year, in Vieux Fort, Saint Lucia, there are 232.4 rainfall days, and 542mm of precipitation is accumulated.

Sea temperature

With an average sea temperature of 29.6°C, September is the month with the warmest seawater in Vieux Fort.
Note: For water activities like swimming, diving, and more, temperatures ranging between 25°C and 29°C offer superior comfort and enjoyment for lengthy durations.

Daylight

In Vieux Fort, the average length of the day in September is 12h and 12min.
On the first day of September, sunrise is at 05:52 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:54 AST.

Sunshine

The average sunshine in September is 10.1h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Vieux Fort. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.