September weather forecast
Grace, Saint Lucia

September continues to sustain high temperatures in Grace, Saint Lucia, but with a reduced wind speed. The reduced wind speed and shorter daylight hours often result in the days feeling hotter. Rainfall in September is quite substantial but slightly less when compared to the previous month. The climatological data reveals an average rainfall of 64mm (2.52") in September in Grace, Saint Lucia. As September gives way to October, there's a slight increase in rainfall and a decrease in temperatures.

Temperature

Grace's warmest season falls during September and October, averaging a high-temperature of 29.5°C (85.1°F).

Heat index

The heat index for September is computed to be a torrid 35°C (95°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In September, the average relative humidity is 75%.

Rainfall

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

Daylight

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

Sunshine

In September, the average sunshine is 10.1h.

UV index

The months with the highest UV index 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 estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 7 during September leads to these advisories:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.