September weather forecastLa Réunion, Seychelles
September
Weather in September
September marks the beginning of the transition from the cool dry season to the warmer wet season in Seychelles. With the increase of rainfall to 79mm (3.11"), both the frequency and intensity of rains start to rise gradually in La Réunion. Water temperature increases slightly, offering a warmer swimming experience. Except for the light showers during the month, September is an attractive timeframe for eco-tourism activities such as bird watching. Weather outlook predicts increasing temperatures and a transition to a more humid climate as September gives way to October.Temperature
The onset of September brings an average high-temperature of a still warm 26.8°C (80.2°F), nearly matching the August temperature. La Réunion maintains an average low-temperature of 26.1°C (79°F) throughout September's nights.Humidity
The months with the highest humidity are July through September, with an average relative humidity of 80%.Rainfall
In La Réunion, during September, the rain falls for 20.5 days and regularly aggregates up to 79mm (3.11") of precipitation. Throughout the year, there are 241.9 rainfall days, and 1432mm (56.38") of precipitation is accumulated.Sea temperature
In La Réunion, the average seawater temperature in September is 27°C (80.6°F).Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.
Daylight
In September, the average length of the day is 12h and 5min.On the first day of the month, sunrise is at 06:15 and sunset at 18:17. On the last day of September, in La Réunion, Seychelles, sunrise is at 06:02 and sunset at 18:10 +04.
Sunshine
With an average of 7h of sunshine, September has the least sunshine of the year in La Réunion, Seychelles.UV index
The months with the highest UV index in La Réunion, Seychelles, 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 reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
La Réunion, Seychelles
- Average high temperature in September: 26.8°C
The warmest month (with the highest average high temperature) is April (29.3°C).
The month with the lowest average high temperature is August (26.4°C).
- Average low temperature in September: 26.1°C
The month with the highest average low temperature is April (28.1°C).
The coldest months (with the lowest average low temperature) are July and August (25.7°C).
Average pressure in September
La Réunion, Seychelles
- Average pressure in September: 1012.3mbar
The month with the highest atmospheric pressure is August (1012.4mbar).
The month with the lowest atmospheric pressure is April (1010.4mbar).
Average wind speed in September
La Réunion, Seychelles
- Average wind speed in September: 26.2km/h
The windiest month (with the highest average wind speed) is August (28.1km/h).
The calmest month (with the lowest average wind speed) is April (12.8km/h).
Average humidity in September
La Réunion, Seychelles
- Average humidity in September: 80%
The months with the highest relative humidity are July, August and September (80%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
La Réunion, Seychelles
- Average rainfall in September: 79mm
The wettest month (with the highest rainfall) is January (220mm).
The driest month (with the least rainfall) is August (50mm).
Average rainfall days in September
La Réunion, Seychelles
- Average rainfall days in September: 20.5 days
The month with the highest number of rainy days is January (23.2 days).
The month with the least rainy days is November (17.3 days).
Average sea temperature in September
La Réunion, Seychelles
- Average sea temperature in September: 27°C
The best month for swimming (with the highest average sea temperature) is April (30°C).
The coldest months (with the lowest average sea temperature) are July and August (26°C).
Average daylight in September /
Average sunshine in September
La Réunion, Seychelles
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 24min).
The month with the shortest days is June (Average daylight: 11h and 54min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is November (Average sunshine: 10h and 6min).
The month with the least sunshine is September (Average sunshine: 7h and 0min).
Average sunshine days in September
La Réunion, Seychelles
- Average sunshine days in September: 3.8 days
The month with the most sunshine days is November (10.9 days).
The month with the least sunshine days is June (3 days).
Average UV index in September
La Réunion, Seychelles
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
La Réunion, Seychelles
- Average cloud cover in September: 51
The month with the most cloud cover is September (Cloud cover 51).
The month with the least cloud cover is November (Cloud cover 41).
Average visibility in September
La Réunion, Seychelles
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
