September weather forecastSaint-Leu, Reunion
September
Weather in September
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint-Leu, Reunion
- Average high temperature in September: 23°C
The warmest months (with the highest average high temperature) are January, February, March and December (27°C).
The months with the lowest average high temperature are July and August (22°C).
- Average low temperature in September: 15°C
The months with the highest average low temperature are January and February (21°C).
The coldest months (with the lowest average low temperature) are July, August and September (15°C).
Average rainfall in September
Saint-Leu, Reunion
- Average rainfall in September: 47mm
The wettest month (with the highest rainfall) is January (241mm).
The driest month (with the least rainfall) is September (47mm).
Average rainfall days in September
Saint-Leu, Reunion
- Average rainfall days in September: 12 days
The months with the highest number of rainy days are February and March (19 days).
The month with the least rainy days is September (12 days).
Average sea temperature in September
Saint-Leu, Reunion
- Average sea temperature in September: 23.7°C
The best month for swimming (with the highest average sea temperature) is March (28.4°C).
The coldest month (with the lowest average sea temperature) is September (23.7°C).
Average daylight in September /
Average sunshine in September
Saint-Leu, Reunion
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).
- Average sunshine in September: 7h
The months with the most sunshine are January, February, September, October, November and December (Average sunshine: 7h).
The months with the least sunshine are March, April, May, June, July and August (Average sunshine: 6h).
Average UV index in September
Saint-Leu, Reunion
- Average UV index in September: 10
The months with the highest UV index are January, February, March, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 6).
