September weather forecast
Saint-Leu, Reunion

September witnesses an uptick in temperature and daylight hours in Saint-Leu. Though the least rainy month, with a mere 47mm (1.85") spread over 12 days, it commences the city's transition from winter to summer. The sea responds with warmer temperatures, gradually luring in swimmers and surfers. The increase in sunshine hours allows for longer exploration days. With the scenery in full bloom, September sets the city alive with color and vibrancy.

Temperature

September brings a marginal elevation to a warm 23°C (73.4°F) from August's 22°C (71.6°F) in Saint-Leu's average high-temperatures. During September, the nighttime temperature in Saint-Leu averages to a mild 15°C (59°F).

Rainfall

September is the month with the least rainfall in Saint-Leu. Rain falls for 12 days and accumulates 47mm (1.85") of precipitation.

Sea temperature

September is the month with the coldest seawater in Saint-Leu, Reunion, with an average sea temperature of 23.7°C (74.7°F).
Note: Swimming in 23.7°C (74.7°F) waters may not appeal to those sensitive to cold. Yet, the presence of sunshine, the strength of the wind, and the air temperature can alter this experience. Some might even opt for a wetsuit for added comfort.

Daylight

The average length of the day in September in Saint-Leu is 11h and 59min.
On the first day of September, sunrise is at 06:27 and sunset at 18:09. On the last day of the month, sunrise is at 06:00 and sunset at 18:17 +04.

Sunshine

The months with the most sunshine in Saint-Leu are January, February, September through December, with an average of 7h of sunshine.

UV index

The average daily maximum UV index in September in Saint-Leu is 10. A UV Index reading of 8 to 10 represents a very high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 10 in September translates into this advice:
Skin and eyes are vulnerable without protection. Ensure you always take precautions. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Avoid direct sun exposure for long periods, especially if prone to burns. Always apply a sunscreen with at least a 30 SPF. Caution! The Sun's UV rays become stronger due to reflections from water and sand.