September weather forecast
Saint-Francois, Guadeloupe

September weather in Saint-Francois, Guadeloupe, presents moderate winds, noticeably lesser than in previous months, topping out at 19.3km/h (12mph). Even as temperatures take a slight dip from August highs, they are still among the year’s highest. The rainfall too is marginally less but doesn’t significantly shift from typical Guadeloupe weather patterns. September maintains relative humidity at a consistent level and gives no major deviations in pressure either. Although sea temperatures continue to be at their peak, the daylight hours gradually shorten.

Temperature

During September, Saint-Francois records an average high-temperature of a still moderately hot 29°C (84.2°F), marking a slight divergence from August's 29.2°C (84.6°F). Saint-Francois indicates a consistently low-temperature of 27.5°C (81.5°F) during the nights of September.

Heat index

The heat index value during September is estimated at a hot 34°C (93.2°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.

Humidity

In Saint-Francois, the average relative humidity in September is 76%.

Rainfall

In Saint-Francois, in September, it is raining for 22 days, with typically 103mm (4.06") of accumulated precipitation. In Saint-Francois, during the entire year, the rain falls for 261.2 days and collects up to 839mm (33.03") of precipitation.

Sea temperature

With an average sea temperature of 29.4°C (84.9°F), September is the month with the warmest seawater.
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in September in Saint-Francois is 12h and 13min.
On the first day of September in Saint-Francois, sunrise is at 05:52 and sunset at 18:17. On the last day of the month, sunrise is at 05:55 and sunset at 17:54 AST.

Sunshine

The average sunshine in September is 10h.

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 Saint-Francois. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take note! The UV strength of the Sun elevates when reflected off water and sand.